CLAUDE.md

@@ -160,6 +160,24 @@ Conventions that follow from it:
   plantings. Fixing it per-call-site is how it came back, which is why the rule
   lives in `commitScope` where no caller can forget it.
 
+- **The assistant's date comes from the client, never from the model.**
+  `POST /agent/chat` carries `today` (the browser's local day, same reason the
+  UI sends `plantedAt`); `Runner.Run` puts it in the system prompt and
+  `NewToolbox` stamps it on every dated tool default through `adapter.day`. A
+  new tool that takes a date defaults through `day()`, not `time.Now()`. Left to
+  guess, the live model dated journal entries a year back (2025) — the year it
+  remembered from training.
+- **`describe_garden` is a summary, not a dump.** Plops are grouped per plant
+  (`service.DescribeGroup`: count, where, planted date, days to maturity) and
+  ids are listed only for groups of ≤ `maxListedPlops`; the first grid-filled
+  garden made the old per-plop describe ~450 entries on every turn. A tool that
+  needs individual ids uses `list_plantings`; bulk work takes (object, plant)
+  — `remove_plantings`, `ClearPlantings`. Don't add a tool that lists plops.
+- **The assistant can't undo and must not pretend to.** Asked to "undo the
+  beets", the live model replied "Done!" and changed nothing. The prompt now
+  forbids claiming a change no tool made and points at the Undo button; keep
+  both rules when editing `systemPrompt`.
+
 - **Request deadlines are extended through `responseController(c)`, never
   `http.NewResponseController(c.Writer)`.** A controller built in a handler
   can't reach the socket — the logging middleware wraps the writer — so every

DESIGN.md

@@ -72,7 +72,10 @@ POST /seed-lots/scan          ← multipart image → a seed-packet proposal (re
 POST /seed-lots/from-packet   ← confirmed proposal → a plant (new or existing) + a lot
 GET,POST /gardens/:id/journal PATCH,DELETE /journal/:id           (editor writes; author edits own)
 GET  /gardens/:id/journal/counts  ← entries per object, for the "has notes" indicator
-POST /agent/chat              ← SSE: step events, then the finished turn (editor only)
+POST /agent/chat              ← SSE: step events, then the finished turn (editor only);
+                                 body {gardenId, message, today?} — today is the sender's LOCAL
+                                 date, told to the model and stamped on everything the turn
+                                 plants, removes or journals (server UTC day when omitted)
 GET,DELETE /gardens/:id/agent/history                             (the actor's own thread)
 GET  /capabilities            ← what this instance can do RIGHT NOW (tracks the live agent, not just config)
 GET,PATCH /settings           ← instance-wide config (admin only): agent model + on/off, vision model;
@@ -146,7 +149,7 @@ React 19 + TypeScript + Vite + Tailwind 4 (`@tailwindcss/vite`), `@tanstack/reac
 7. **Sharing** — invite by email, roles, viewer read-only mode.
 8. **Polish** — imperial toggle, mobile ergonomics, clear-bed, keyboard nudging.
 9. **Agent seam** — `ops.go` bulk ops + `internal/agent` DefineTool wrappers.
-10. **Garden assistant** — majordomo in-process, Ollama Cloud, streaming chat. Each turn runs inside ONE change set (`source='agent'`), so a turn that clears a bed and replants it undoes as one action; that is what makes acting without a confirmation prompt defensible. Bounded by a step cap and a timeout — loop safety, not spend control. The `majordomo` build tag is gone: a tag that keeps the agent out of the binary only earns its keep if you'd ship a build without it, and the agent is the point.
+10. **Garden assistant** — majordomo in-process, Ollama Cloud, streaming chat. Each turn runs inside ONE change set (`source='agent'`), so a turn that clears a bed and replants it undoes as one action; that is what makes acting without a confirmation prompt defensible. Bounded by a step cap and a timeout — loop safety, not spend control. The `majordomo` build tag is gone: a tag that keeps the agent out of the binary only earns its keep if you'd ship a build without it, and the agent is the point. What a day of live use added: the turn carries the gardener's **local day** (`today` in the chat body) into the prompt and every dated tool default, because the model's own idea of the date was a year stale and the server's is UTC; `describe_garden` **groups plops by plant** (count, where, planted date, days to maturity — `DescribeGroup`) and lists ids only for small groups, with `list_plantings` for the rest and `remove_plantings` to act on a whole group; `move_planting` relocates a plop (`MovePlanting`, within or across beds) keeping its planting date; `fill_region` takes an explicit local rectangle and a `seedLotId`; `update_plant`, `read_history` and `copy_garden` (the "<garden> — <year>" plan convention) round out what the model kept reaching for. A mutation on another garden inside a turn is recorded under THAT garden (`record` refuses to file revisions into a scope for a different garden), so undo always finds them where the person is looking.
 
 ## Deliberate v1 limits
 

internal/agent/doc.go

@@ -29,8 +29,15 @@
 //
 // # Unconfigured instances
 //
-// With no API key the assistant is simply not offered: the chat route isn't
+// With no API key the assistant is simply not offered: the chat route answers
-// registered and the capability isn't advertised — the same shape as OIDC
+// 503 and /capabilities says agent:false, so the UI never shows the tab. (The
-// 404ing when unconfigured. An instance without a key starts and serves the app
+// route is always registered — a Settings change can turn the assistant on
-// exactly as it did before.
+// without a restart, which a missing route couldn't do.) An instance without a
+// key starts and serves the app exactly as it did before.
+//
+// # The gardener's day
+//
+// A turn carries the person's local date (from the client) into the prompt and
+// every dated tool default. The model is never the source of a date: left to
+// guess, it wrote the year it remembered from training.
 package agent

internal/agent/runtime.go

@@ -32,6 +32,9 @@ const (
 	maxSameCallRepeats       = 3
 )
 
+// dateLayout is the YYYY-MM-DD form every date crosses the tool boundary in.
+const dateLayout = "2006-01-02"
+
 // Runner drives a model over pansy's toolbox. One per process; Run is safe to
 // call concurrently.
 type Runner struct {
@@ -73,17 +76,31 @@ type Turn struct {
 	Truncated bool `json:"truncated,omitempty"`
 }
 
-// Run executes one turn against a garden, as actorID.
+// Run executes one turn against a garden, as actorID, on the day it is where
+// they are.
+//
+// today is the gardener's local date (YYYY-MM-DD) as the client reports it; it
+// goes into the prompt, so the model knows what day it is, and to every tool, so
+// what the turn plants, removes or journals is dated the day the person did it.
+// Empty means "the service's UTC today" — the best a caller with no local clock
+// (a bare API client) can do. The model itself must never be the source of the
+// date: left to guess, the live one stamped a year it remembered from training.
 //
 // The whole turn runs inside ONE change set, so everything the model did undoes
 // together. That is what makes acting without a confirmation prompt defensible.
 // The scope is opened even for a turn that turns out to be a question — a change
 // set with no revisions is never written, so asking costs nothing.
-func (r *Runner) Run(ctx context.Context, actorID, gardenID int64, message string, history []llm.Message, onStep func(agent.Step)) (*Turn, error) {
+func (r *Runner) Run(ctx context.Context, actorID, gardenID int64, message, today string, history []llm.Message, onStep func(agent.Step)) (*Turn, error) {
 	message = strings.TrimSpace(message)
 	if message == "" {
 		return nil, domain.ErrInvalidInput
 	}
+	today = strings.TrimSpace(today)
+	if today == "" {
+		today = time.Now().UTC().Format(dateLayout)
+	} else if _, err := time.Parse(dateLayout, today); err != nil {
+		return nil, fmt.Errorf("%w: today must be a YYYY-MM-DD date", domain.ErrInvalidInput)
+	}
 
 	ctx, cancel := context.WithTimeout(ctx, runTimeout)
 	defer cancel()
@@ -109,8 +126,8 @@ func (r *Runner) Run(ctx context.Context, actorID, gardenID int64, message strin
 		Summary:    turnSummary(message),
 		AgentRunID: &runID,
 	}, func(ctx context.Context) error {
-		box := NewToolbox(r.svc, actorID)
+		box := NewToolbox(r.svc, actorID, today)
-		a := agent.New(r.model, systemPrompt(garden),
+		a := agent.New(r.model, systemPrompt(garden, today),
 			agent.WithMaxSteps(maxSteps),
 			agent.WithToolErrorLimits(maxConsecutiveToolErrors, maxSameCallRepeats),
 		)
@@ -198,35 +215,73 @@ func turnSummary(message string) string {
 	return s
 }
 
-// systemPrompt gives the model the conventions it cannot infer.
+// systemPrompt gives the model the conventions it cannot infer, the day it is,
+// and the rules of conduct the live instance showed it needs.
 //
 // The compass convention in particular is not guessable: -y is north because
 // screen y grows downward, and a model that assumes otherwise plants the south
-// half when asked for the north one.
+// half when asked for the north one. The date is not guessable either — a model
-func systemPrompt(g *domain.Garden) string {
+// asked to backdate nothing still wrote the year it remembered from training —
-	units := "metric — all measurements are centimeters"
+// and the conduct rules each answer a thing the assistant actually did in live
+// testing: reported a change it never made, narrated every planting into the
+// journal, swapped four beds on an ambiguous sentence, and answered an imperial
+// gardener in centimeters.
+func systemPrompt(g *domain.Garden, today string) string {
+	units := "The gardener works in meters and centimeters; answer in those."
+	size := fmt.Sprintf("%.0f x %.0f cm", g.WidthCM, g.HeightCM)
 	if g.UnitPref == domain.UnitImperial {
-		units = "imperial for display, but every measurement you send or receive is in CENTIMETERS"
+		units = "The gardener thinks in feet and inches. Convert what they say before calling a tool " +
+			"(1 ft = 30.48 cm, 1 in = 2.54 cm) and answer in feet and inches, never in centimeters."
+		size = fmt.Sprintf("%.1f x %.1f ft (%.0f x %.0f cm)", g.WidthCM/30.48, g.HeightCM/30.48, g.WidthCM, g.HeightCM)
 	}
 	return fmt.Sprintf(`You are pansy's garden assistant. You help plan and edit a real garden by calling tools.
 
-The garden you are working on is %q (id %d), %.0f x %.0f cm. The user's units are %s.
+The garden you are working on is %q (id %d), %s. Today is %s — the gardener's local date.
+%s
 
 Conventions you cannot guess and must not assume:
+- Every measurement a tool takes or returns is in CENTIMETERS.
 - Positions in a garden are centimeters from its top-left corner: x grows east, y grows SOUTH.
 - Inside an object (a bed), positions are relative to that object's CENTER, and -y is NORTH.
   So the north half of a bed is negative y. Getting this backwards plants the wrong end.
 - Objects and plantings are version-guarded. Use the version from describe_garden when editing.
+- Dates are YYYY-MM-DD. Tools date what they plant, remove or journal as today unless you pass
+  a date; pass one only when the gardener says it happened on another day.
 
 How to work:
-- Start from describe_garden to see what is actually there. Do not guess ids.
+- Start from describe_garden to see what is actually there. Do not guess ids. It groups each
-- Use find_plant to turn a plant name into an id. If it returns several candidates,
+  bed's plantings by plant, with a count, a rough location and the planting date; a group lists
-  pick the one that matches what the user said, or ask them which they meant.
+  its plops one by one only when it is small. For the ids of a large group use list_plantings,
-- To replant a bed with something else: clear_object, then fill_region with region "all".
+  or act on the whole group at once with remove_plantings.
-- When a tool refuses (for example, the user only has view access to this garden),
+- Use find_plant to turn a plant name into an id. If it returns several candidates, pick the one
-  explain what happened in plain words. Do not retry it.
+  that matches what the user said, or ask them which they meant.
+- To replant a bed with something else: clear_object, then fill_region with region "all". To take
+  one plant out of a mixed bed: remove_plantings. To relocate plants: move_planting, which keeps
+  their planting date — do not remove and replant them.
+- fill_region in grid mode lays out individual plants at true spacing, which is what "so I can
+  plant from it" means; clump mode is a quick sketch. For an area no compass name describes (a
+  middle third, a strip along one edge) give fill_region a rectangle instead of placing plops by hand.
+- A garden named %s is this garden's plan for that year; copy_garden with that name
+  makes one. Never use a different real garden as a scratch space.
+- When a tool refuses (for example, the user only has view access to this garden), explain what
+  happened in plain words. Do not retry it.
 
-When you are done, say briefly what you changed — the user is watching the canvas
+How to behave:
-and wants to know what to look at. If you changed nothing, say that too.`,
+- Only claim what a tool actually did. If a tool failed, or there is no tool for what was asked,
-		g.Name, g.ID, g.WidthCM, g.HeightCM, units)
+  say so plainly — never describe a change you did not make.
+- You cannot undo. Every reply of yours that changed the garden has an "Undo this" button under
+  it, and the History panel can revert any change; point the gardener there, or offer to reverse
+  the change by hand with tools.
+- When a request could mean materially different things — "swap the cucumbers and the melons"
+  with two beds of each — say what you would do and ask, rather than clearing beds on a guess.
+  When it is clear, just do it.
+- The plan already records what was planted where and when. Write a journal entry only when the
+  gardener asks for one or tells you something that happened — weather, pests, a harvest, an
+  observation — not to narrate your own planting.
+- The gardener is watching the canvas. When you are done, say briefly what you changed and where
+  to look; if you changed nothing, say that too.`,
+		// %q throughout for the garden's name: any editor can rename a garden, and
+		// a name is data, not prompt — quoting keeps a newline or a stray quote
+		// in it from reading as a new instruction.
+		g.Name, g.ID, size, today, units, fmt.Sprintf("%q", g.Name+" — <year>"))
 }

internal/agent/runtime_test.go

@@ -75,7 +75,7 @@ func TestTurnIsOneChangeSet(t *testing.T) {
 		fake.Reply("Cleared the garlic and replanted the bed with cucumbers."),
 	)
 
-	turn, err := r.Run(ctx, owner, g.ID, "change the garlic bed to cucumbers this year", nil, nil)
+	turn, err := r.Run(ctx, owner, g.ID, "change the garlic bed to cucumbers this year", "", nil, nil)
 	if err != nil {
 		t.Fatalf("Run: %v", err)
 	}
@@ -152,14 +152,14 @@ func TestViewerGetsAnExplainableRefusal(t *testing.T) {
 	// A viewer can't open a change set at all, so the turn is refused up front —
 	// before any model call — and the API turns that into a plain explanation.
 	r := scriptedRunner(t, svc, fake.Reply("unused"))
-	_, err = r.Run(ctx, viewer.ID, g.ID, "plant garlic in that bed", nil, nil)
+	_, err = r.Run(ctx, viewer.ID, g.ID, "plant garlic in that bed", "", nil, nil)
 	if !errors.Is(err, domain.ErrForbidden) {
 		t.Fatalf("viewer turn err = %v, want ErrForbidden", err)
 	}
 
 	// And at the tool layer, a refusal comes back as a readable tool result
 	// rather than killing the run.
-	box := NewToolbox(svc, viewer.ID)
+	box := NewToolbox(svc, viewer.ID, "")
 	raw, _ := json.Marshal(map[string]any{"objectId": bed.ID})
 	res := box.Execute(ctx, llm.ToolCall{ID: "1", Name: "clear_object", Arguments: raw})
 	if !res.IsError {
@@ -187,7 +187,7 @@ func TestRunStopsAtTheStepCap(t *testing.T) {
 	}
 	r := scriptedRunner(t, svc, steps...)
 
-	turn, err := r.Run(ctx, owner, g.ID, "look at the garden", nil, nil)
+	turn, err := r.Run(ctx, owner, g.ID, "look at the garden", "", nil, nil)
 	if err != nil {
 		t.Fatalf("a capped run should end cleanly, got %v", err)
 	}
@@ -218,7 +218,7 @@ func TestReadOnlyTurnWritesNoChangeSet(t *testing.T) {
 		toolCall("describe_garden", map[string]any{"gardenId": g.ID}),
 		fake.Reply("It's empty — nothing planted yet."),
 	)
-	turn, err := r.Run(ctx, owner, g.ID, "what's in the garden?", nil, nil)
+	turn, err := r.Run(ctx, owner, g.ID, "what's in the garden?", "", nil, nil)
 	if err != nil {
 		t.Fatalf("Run: %v", err)
 	}
@@ -268,8 +268,8 @@ func TestTurnSummaryFitsAHistoryRow(t *testing.T) {
 // TestSystemPromptStatesTheCompassConvention — -y being north is not guessable,
 // and a model that assumes otherwise plants the wrong end of the bed.
 func TestSystemPromptStatesTheCompassConvention(t *testing.T) {
-	p := systemPrompt(&domain.Garden{ID: 1, Name: "Plot", WidthCM: 500, HeightCM: 400, UnitPref: domain.UnitImperial})
+	p := systemPrompt(&domain.Garden{ID: 1, Name: "Plot", WidthCM: 500, HeightCM: 400, UnitPref: domain.UnitImperial}, "2026-08-22")
-	for _, want := range []string{"NORTH", "-y", "centimeters", "Plot", "version"} {
+	for _, want := range []string{"NORTH", "-y", "CENTIMETERS", "Plot", "version"} {
 		if !strings.Contains(p, want) {
 			t.Errorf("system prompt is missing %q:\n%s", want, p)
 		}
@@ -315,7 +315,7 @@ func TestPartialWorkSurvivesATimeout(t *testing.T) {
 		time.Sleep(50 * time.Millisecond)
 		cancel()
 	}()
-	_, err = r.Run(cancelled, owner, g.ID, "move the bed", nil, nil)
+	_, err = r.Run(cancelled, owner, g.ID, "move the bed", "", nil, nil)
 	if err == nil {
 		t.Fatal("expected the turn to fail")
 	}
@@ -356,3 +356,147 @@ func TestTurnSummaryTrimsByRunes(t *testing.T) {
 		t.Errorf("summary is %d runes, want it trimmed", n)
 	}
 }
+
+// TestSystemPromptKnowsTheDayAndTheGardenersUnits — two things the live model
+// got wrong for want of being told: it dated journal entries with the year it
+// remembered from training, and answered a feet-and-inches gardener in
+// centimeters. The conduct rules are checked by their load-bearing phrases.
+func TestSystemPromptKnowsTheDayAndTheGardenersUnits(t *testing.T) {
+	imperial := systemPrompt(&domain.Garden{ID: 1, Name: "Plot", WidthCM: 731.52, HeightCM: 731.52, UnitPref: domain.UnitImperial}, "2026-08-22")
+	for _, want := range []string{
+		"Today is 2026-08-22",
+		"feet and inches",
+		"24.0 x 24.0 ft",
+		"never describe a change you did not make",
+		"You cannot undo",
+		"Undo this",
+		"rather than clearing beds on a guess",
+		"not to narrate your own planting",
+		`"Plot — <year>"`,
+		"remove_plantings",
+		"move_planting",
+		"list_plantings",
+	} {
+		if !strings.Contains(imperial, want) {
+			t.Errorf("imperial prompt is missing %q", want)
+		}
+	}
+	metric := systemPrompt(&domain.Garden{ID: 1, Name: "Plot", WidthCM: 500, HeightCM: 400, UnitPref: domain.UnitMetric}, "2026-08-22")
+	if strings.Contains(metric, "feet and inches") {
+		t.Error("metric prompt tells the model to answer in feet and inches")
+	}
+	if !strings.Contains(metric, "500 x 400 cm") {
+		t.Error("metric prompt doesn't state the garden's size in cm")
+	}
+}
+
+// TestRunRejectsAMalformedToday — the date reaches every tool as a default, so a
+// bad one must stop the turn before the model runs, not fail its first fill.
+func TestRunRejectsAMalformedToday(t *testing.T) {
+	ctx := context.Background()
+	svc, owner := newAgentTestService(t)
+	g, err := svc.CreateGarden(ctx, owner, service.GardenInput{Name: "Plot", WidthCM: 2000, HeightCM: 2000})
+	if err != nil {
+		t.Fatalf("garden: %v", err)
+	}
+	r := scriptedRunner(t, svc, fake.Reply("unused"))
+	if _, err := r.Run(ctx, owner, g.ID, "hello", "yesterday", nil, nil); !errors.Is(err, domain.ErrInvalidInput) {
+		t.Errorf("Run with today=%q: err = %v, want ErrInvalidInput", "yesterday", err)
+	}
+}
+
+// TestTurnDatesItsWorkTheGardenersDay — what a turn plants is dated the day the
+// gardener sent it, not the server's UTC day (which is tomorrow by nine in the
+// evening in Ohio) and not a day the model chose.
+func TestTurnDatesItsWorkTheGardenersDay(t *testing.T) {
+	ctx := context.Background()
+	svc, owner := newAgentTestService(t)
+	g, err := svc.CreateGarden(ctx, owner, service.GardenInput{Name: "Plot", WidthCM: 2000, HeightCM: 2000})
+	if err != nil {
+		t.Fatalf("garden: %v", err)
+	}
+	garlic := mustPlant(t, svc, owner, "Garlic", 15, "🧄")
+	bed, err := svc.CreateObject(ctx, owner, g.ID, service.ObjectInput{
+		Kind: domain.KindBed, Name: "Bed", XCM: 1000, YCM: 1000, WidthCM: 200, HeightCM: 200,
+	})
+	if err != nil {
+		t.Fatalf("bed: %v", err)
+	}
+	r := scriptedRunner(t, svc,
+		toolCall("fill_region", map[string]any{"objectId": bed.ID, "region": "all", "plantId": garlic.ID}),
+		fake.Reply("Filled the bed with garlic."),
+	)
+	if _, err := r.Run(ctx, owner, g.ID, "fill the bed with garlic", "2026-08-22", nil, nil); err != nil {
+		t.Fatalf("Run: %v", err)
+	}
+	full, err := svc.GardenFull(ctx, owner, g.ID, nil)
+	if err != nil {
+		t.Fatalf("GardenFull: %v", err)
+	}
+	if len(full.Plantings) == 0 {
+		t.Fatal("the turn planted nothing")
+	}
+	for _, p := range full.Plantings {
+		if p.PlantedAt == nil || *p.PlantedAt != "2026-08-22" {
+			t.Errorf("plop %d plantedAt = %v, want the gardener's day 2026-08-22", p.ID, p.PlantedAt)
+		}
+	}
+}
+
+// TestTurnOnAnotherGardenFilesHistoryThere — a turn is scoped to one garden, but
+// nothing stops the model from pointing a tool at an object in another garden
+// the person can edit ("do the same in my other garden"). Those revisions must
+// land in THAT garden's history, as the agent's work, where its undo can see
+// them — not in the open scope, where undoing this turn would quietly revert
+// rows in a garden the person isn't looking at.
+func TestTurnOnAnotherGardenFilesHistoryThere(t *testing.T) {
+	ctx := context.Background()
+	svc, owner := newAgentTestService(t)
+	a, err := svc.CreateGarden(ctx, owner, service.GardenInput{Name: "A", WidthCM: 2000, HeightCM: 2000})
+	if err != nil {
+		t.Fatalf("garden A: %v", err)
+	}
+	b, err := svc.CreateGarden(ctx, owner, service.GardenInput{Name: "B", WidthCM: 2000, HeightCM: 2000})
+	if err != nil {
+		t.Fatalf("garden B: %v", err)
+	}
+	bedB, err := svc.CreateObject(ctx, owner, b.ID, service.ObjectInput{
+		Kind: domain.KindBed, Name: "Bed", XCM: 1000, YCM: 1000, WidthCM: 200, HeightCM: 200,
+	})
+	if err != nil {
+		t.Fatalf("bed: %v", err)
+	}
+	beforeA, _, _ := svc.GardenHistory(ctx, owner, a.ID, 0, 0)
+	beforeB, _, _ := svc.GardenHistory(ctx, owner, b.ID, 0, 0)
+
+	r := scriptedRunner(t, svc,
+		toolCall("update_object", map[string]any{"objectId": bedB.ID, "version": bedB.Version, "name": "Renamed from A"}),
+		fake.Reply("Renamed the bed in B."),
+	)
+	turn, err := r.Run(ctx, owner, a.ID, "rename the bed in my other garden", "", nil, nil)
+	if err != nil {
+		t.Fatalf("Run: %v", err)
+	}
+	if turn.ChangeSetID != nil {
+		t.Errorf("the turn on A produced change set %d, but it changed nothing in A", *turn.ChangeSetID)
+	}
+	afterA, _, _ := svc.GardenHistory(ctx, owner, a.ID, 0, 0)
+	if len(afterA) != len(beforeA) {
+		t.Errorf("A's history grew by %d for a change made in B", len(afterA)-len(beforeA))
+	}
+	afterB, _, _ := svc.GardenHistory(ctx, owner, b.ID, 0, 0)
+	if len(afterB) != len(beforeB)+1 {
+		t.Fatalf("B's history grew by %d, want 1", len(afterB)-len(beforeB))
+	}
+	if cs := afterB[0]; cs.Source != domain.SourceAgent || cs.AgentRunID == nil {
+		t.Errorf("B's entry = source %q, run %v; want the agent's, with its run id", cs.Source, cs.AgentRunID)
+	}
+	// And it undoes from B, where the person would look for it.
+	if _, conflicts, err := svc.RevertChangeSet(ctx, owner, afterB[0].ID, domain.SourceUI); err != nil || len(conflicts) != 0 {
+		t.Fatalf("undo from B: err=%v conflicts=%+v", err, conflicts)
+	}
+	d, _ := svc.DescribeGarden(ctx, owner, b.ID)
+	if len(d.Objects) != 1 || d.Objects[0].Name != "Bed" {
+		t.Errorf("after undo B's bed is %+v, want its original name back", d.Objects)
+	}
+}

internal/agent/tools.go

@@ -2,28 +2,45 @@ package agent
 
 import (
 	"context"
+	"fmt"
+	"strings"
 
 	"gitea.stevedudenhoeffer.com/steve/majordomo/llm"
 
+	"gitea.stevedudenhoeffer.com/steve/pansy/internal/domain"
 	"gitea.stevedudenhoeffer.com/steve/pansy/internal/service"
 )
 
 // NewToolbox builds a majordomo toolbox over pansy's service layer, bound to a
-// single acting user. Every tool call runs as actorID, so pansy's permission
+// single acting user and to the day it is where they are. Every tool call runs
-// checks (requireGardenRole / objectForRole) apply unchanged. Construct one per
+// as actorID, so pansy's permission checks (requireGardenRole / objectForRole)
-// authenticated agent session:
+// apply unchanged. Construct one per authenticated agent session:
 //
-//	box := agent.NewToolbox(svc, session.UserID)
+//	box := agent.NewToolbox(svc, session.UserID, "2026-08-22")
 //	agent.Run(ctx, model, box, "fill the NE corner with garlic")
-func NewToolbox(svc *service.Service, actorID int64) *llm.Toolbox {
+//
-	a := &adapter{svc: svc, actor: actorID}
+// today (YYYY-MM-DD) is the date every tool stamps on what it plants, removes or
+// journals unless the model passes one — the gardener's local day, from the
+// client, because the server's UTC day is tomorrow by nine in the evening in
+// Ohio. Empty falls back to the service's UTC today.
+func NewToolbox(svc *service.Service, actorID int64, today string) *llm.Toolbox {
+	a := &adapter{svc: svc, actor: actorID, today: strings.TrimSpace(today)}
 	return llm.NewToolbox("pansy",
 		llm.DefineTool("list_gardens",
 			"List the gardens the user can see (owned and shared), with the user's role on each.",
 			a.listGardens),
 		llm.DefineTool("describe_garden",
-			"Summarize a garden: its dimensions, objects (with sizes/positions/version), and each object's active plantings with a rough compass location.",
+			"Summarize a garden: its dimensions, objects (with sizes/positions/version), and each "+
+				"object's active plantings grouped by plant — how many, roughly where, when they went in, "+
+				"and days to maturity when known. A small group lists its plops individually (id + "+
+				"version, for move_planting/remove_planting); a large one (a grid-filled bed) does not — "+
+				"use list_plantings for those ids, or act on the whole group with remove_plantings.",
 			a.describeGarden),
+		llm.DefineTool("list_plantings",
+			"List one object's active plops one by one, each with its id, version, location, count and "+
+				"planting date — the detail describe_garden leaves out for a large group. Narrow to one "+
+				"plant with plantId. Use it only when you need to address individual plops.",
+			a.listPlantings),
 		llm.DefineTool("create_object",
 			"Add an object (bed, grow_bag, container, in_ground, tree, path, structure) to a garden, positioned by its center in garden cm.",
 			a.createObject),
@@ -31,16 +48,38 @@ func NewToolbox(svc *service.Service, actorID int64) *llm.Toolbox {
 			"Move an object to a new center position (garden cm). Needs the object's current version from describe_garden.",
 			a.moveObject),
 		llm.DefineTool("place_planting",
-			"Place one plop of a plant inside a plantable object, positioned in the object's LOCAL frame (0,0 = object center, -y = north).",
+			"Place one plop of a plant inside a plantable object, positioned in the object's LOCAL frame "+
+				"(0,0 = object center, -y = north). Omit radiusCm for a single plant (it defaults to half "+
+				"the plant's spacing); a larger radius is a clump, whose plant count is derived from its "+
+				"area unless you pass count. Dated today unless plantedAt says otherwise.",
 			a.placePlanting),
 		llm.DefineTool("fill_region",
 			"Fill part of a plantable object with one plant, hex-packed at the plant's spacing. "+
-				"region is a compass name, not coordinates: nw|ne|sw|se for the quarter corners, "+
+				"Say where EITHER by region — a compass name, not coordinates: nw|ne|sw|se for the quarter "+
-				"north|south|east|west (or top|bottom|left|right) for halves, or all for the whole thing. "+
+				"corners, north|south|east|west (or top|bottom|left|right) for halves, or all for the whole "+
-				"North is the top of the garden. Example: to replant a whole bed, clear_object then "+
+				"thing; north is the top of the garden — OR by an explicit rectangle in the object's local "+
-				"fill_region with region=all. Filling skips spots already covered by an existing plant, "+
+				"frame (x0Cm,y0Cm,x1Cm,y1Cm; 0,0 = center, -y = north), for a middle third, a strip along "+
-				"so it is safe to run twice.",
+				"one edge, or any area a compass name can't say. Example: to replant a whole bed, "+
+				"clear_object then fill_region with region=all. Filling skips spots already covered by an "+
+				"existing plant, so it is safe to run twice. Dated today unless plantedAt says otherwise.",
 			a.fillRegion),
+		llm.DefineTool("move_planting",
+			"Move ONE plop to a new position — within its object, or into another plantable object of "+
+				"the same garden with toObjectId — keeping its plant, size, count and planting date. This "+
+				"is how to relocate plants; removing and re-placing them would lose when they were planted. "+
+				"Needs the plop's id and version (describe_garden or list_plantings).",
+			a.movePlanting),
+		llm.DefineTool("remove_planting",
+			"Remove ONE plop from a bed, leaving the rest — the single-plant answer to clear_object's "+
+				"all-or-nothing. Soft-removes it (kept for planting history, undoable), like clearing a "+
+				"bed does. Needs the plop's id and version (describe_garden or list_plantings). Use "+
+				"for \"pull the basil out of the corner\".",
+			a.removePlanting),
+		llm.DefineTool("remove_plantings",
+			"Remove every plop of ONE plant from an object, leaving the other plants in it — \"take the "+
+				"beets out of the south bed\". Soft-removes them (kept for planting history, undoable as "+
+				"one change). Use this rather than many remove_planting calls.",
+			a.removePlantings),
 		llm.DefineTool("clear_object",
 			"Remove all plants from an object. They are soft-removed, so the planting history for past "+
 				"seasons is kept and the change can be undone. Use this before replanting a bed with "+
@@ -58,11 +97,18 @@ func NewToolbox(svc *service.Service, actorID int64) *llm.Toolbox {
 				"yet. Check find_plant first — creating a duplicate of something that already exists is "+
 				"worse than reusing it. The plant belongs to the user, not to any garden.",
 			a.createPlant),
+		llm.DefineTool("update_plant",
+			"Change a plant in the user's own catalog: its name, category, spacing, color, days to "+
+				"maturity, vendor, source link or notes. Only the fields you pass change. Needs the "+
+				"plant's current version from find_plant. Built-in plants can't be edited — create_plant "+
+				"the user's own variety instead.",
+			a.updatePlant),
 		llm.DefineTool("add_journal_entry",
 			"Write a dated observation into the garden's grow journal — what happened, and when. "+
 				"Attach it to one bed with objectId when it is about that bed. This is for events "+
 				"(\"powdery mildew on the west bed\", \"first frost\"), not for descriptions of what a "+
-				"thing is. observedAt defaults to today; set it to backdate.",
+				"thing is and not for narrating your own plantings. observedAt defaults to today; set "+
+				"it to backdate.",
 			a.addJournalEntry),
 		llm.DefineTool("read_journal",
 			"Read back the garden's grow journal — the observations add_journal_entry wrote. "+
@@ -70,6 +116,13 @@ func NewToolbox(svc *service.Service, actorID int64) *llm.Toolbox {
 				"recently observed first. Use this to answer \"what did I note about the west bed?\" "+
 				"or \"what happened last spring?\".",
 			a.readJournal),
+		llm.DefineTool("read_history",
+			"Read the garden's change history: every change anyone made — by hand in the editor, or "+
+				"in an earlier conversation with you — newest first, with what it changed and whether it "+
+				"was undone. Use it to answer \"what changed this week?\" or \"what did you do last time?\" "+
+				"rather than reciting from memory. You cannot undo from here; the person has an Undo "+
+				"button on each change.",
+			a.readHistory),
 		llm.DefineTool("update_object",
 			"Change an existing object: resize it (widthCm/heightCm), rotate it (rotationDeg), "+
 				"rename it (name), or toggle whether it can hold plants (plantable). Only the fields "+
@@ -82,12 +135,6 @@ func NewToolbox(svc *service.Service, actorID int64) *llm.Toolbox {
 				"counterpart to create_object — use it for \"remove the old grow bag\". Permanent (not "+
 				"the same as clearing a bed's plants); prefer clear_object when the bed itself stays.",
 			a.deleteObject),
-		llm.DefineTool("remove_planting",
-			"Remove ONE plop from a bed, leaving the rest — the single-plant answer to clear_object's "+
-				"all-or-nothing. Soft-removes it (kept for planting history, undoable), like clearing a "+
-				"bed does. Needs the plop's id and version from describe_garden. Use for \"pull the "+
-				"basil out of the corner\".",
-			a.removePlanting),
 		llm.DefineTool("list_seed_lots",
 			"List the seed lots (purchases) the user has recorded — vendor, quantity, and what's "+
 				"left — optionally for one plant via plantId. This is the detail behind the \"seed "+
@@ -96,15 +143,37 @@ func NewToolbox(svc *service.Service, actorID int64) *llm.Toolbox {
 		llm.DefineTool("record_seed_lot",
 			"Record a seed purchase for a plant the user owns, so pansy can track how much is left. "+
 				"Get the plantId from find_plant first. quantity + unit is what was bought (e.g. 2 "+
-				"\"packets\", or 500 \"seeds\"). Use for \"I bought two packets of Cherokee Purple\".",
+				"\"packets\", or 500 \"seeds\"). Use for \"I bought two packets of Cherokee Purple\". To "+
+				"count seed as used, plant with a seedLotId on place_planting or fill_region.",
 			a.recordSeedLot),
+		llm.DefineTool("copy_garden",
+			"Duplicate a garden the user owns — beds, objects and plantings — as a new garden with the "+
+				"given name. This is how a season plan is made: a copy named \"<garden name> — <year>\" "+
+				"(with an em dash) is that garden's plan for the year, and the editor offers it as such. "+
+				"Use it for \"set up next year's plan\"; never use another real garden as a scratch space.",
+			a.copyGarden),
 	)
 }
 
-// adapter carries the service and the acting user for the tool handlers.
+// adapter carries the service, the acting user and their local day for the
+// tool handlers.
 type adapter struct {
 	svc   *service.Service
 	actor int64
+	today string
+}
+
+// day is the date a tool stamps: the one the model passed, else the gardener's
+// local today, else nil for the service's UTC default.
+func (a *adapter) day(explicit string) *string {
+	if d := strings.TrimSpace(explicit); d != "" {
+		return &d
+	}
+	if a.today != "" {
+		d := a.today
+		return &d
+	}
+	return nil
 }
 
 func (a *adapter) listGardens(ctx context.Context, _ struct{}) (any, error) {
@@ -117,6 +186,13 @@ func (a *adapter) describeGarden(ctx context.Context, args struct {
 	return a.svc.DescribeGarden(ctx, a.actor, args.GardenID)
 }
 
+func (a *adapter) listPlantings(ctx context.Context, args struct {
+	ObjectID int64  `json:"objectId" description:"object whose plops to list"`
+	PlantID  *int64 `json:"plantId" description:"optional: only plops of this plant"`
+}) (any, error) {
+	return a.svc.ListObjectPlantings(ctx, a.actor, args.ObjectID, args.PlantID)
+}
+
 func (a *adapter) createObject(ctx context.Context, args struct {
 	GardenID int64   `json:"gardenId" description:"garden to add the object to"`
 	Kind     string  `json:"kind" description:"bed | grow_bag | container | in_ground | tree | path | structure"`
@@ -144,28 +220,72 @@ func (a *adapter) moveObject(ctx context.Context, args struct {
 }
 
 func (a *adapter) placePlanting(ctx context.Context, args struct {
-	ObjectID int64   `json:"objectId" description:"plantable object to plant in"`
+	ObjectID  int64   `json:"objectId" description:"plantable object to plant in"`
-	PlantID  int64   `json:"plantId" description:"plant to place"`
+	PlantID   int64   `json:"plantId" description:"plant to place"`
-	XCM      float64 `json:"xCm" description:"center x in the object's local frame (cm; 0,0 = center, -y = north)"`
+	XCM       float64 `json:"xCm" description:"center x in the object's local frame (cm; 0,0 = center, -y = north)"`
-	YCM      float64 `json:"yCm" description:"center y in the object's local frame (cm)"`
+	YCM       float64 `json:"yCm" description:"center y in the object's local frame (cm)"`
-	RadiusCM float64 `json:"radiusCm" description:"plop radius in cm"`
+	RadiusCM  float64 `json:"radiusCm" description:"optional plop radius in cm; omit (0) for one plant at half the plant's spacing"`
-	Count    *int    `json:"count" description:"optional explicit plant count; omit to derive from area ÷ spacing²"`
+	Count     *int    `json:"count" description:"optional explicit plant count; omit to derive from area ÷ spacing²"`
+	PlantedAt string  `json:"plantedAt" description:"optional planting date, YYYY-MM-DD; defaults to today"`
+	SeedLotID *int64  `json:"seedLotId" description:"optional seed lot (from list_seed_lots) this planting uses, so the lot counts it as used"`
 }) (any, error) {
 	return a.svc.CreatePlanting(ctx, a.actor, args.ObjectID, service.PlantingInput{
 		PlantID: args.PlantID, XCM: args.XCM, YCM: args.YCM, RadiusCM: args.RadiusCM, Count: args.Count,
+		PlantedAt: a.day(args.PlantedAt), SeedLotID: args.SeedLotID,
 	})
 }
 
 func (a *adapter) fillRegion(ctx context.Context, args struct {
 	ObjectID        int64    `json:"objectId" description:"plantable object to fill"`
-	Region          string   `json:"region" description:"nw|ne|sw|se corner, north|south|east|west (or top|bottom|left|right) half, or all"`
+	Region          string   `json:"region" description:"nw|ne|sw|se corner, north|south|east|west (or top|bottom|left|right) half, or all; leave empty when giving a rectangle"`
+	X0CM            *float64 `json:"x0Cm" description:"rectangle instead of region: west edge, local cm (0 = center)"`
+	Y0CM            *float64 `json:"y0Cm" description:"rectangle: north edge, local cm (negative is north of center)"`
+	X1CM            *float64 `json:"x1Cm" description:"rectangle: east edge, local cm"`
+	Y1CM            *float64 `json:"y1Cm" description:"rectangle: south edge, local cm"`
 	PlantID         int64    `json:"plantId" description:"plant to fill with"`
 	SpacingOverride *float64 `json:"spacingOverrideCm" description:"optional in-row spacing override in cm; omit to use the plant's spacing"`
 	Mode            string   `json:"mode" enum:"clump,grid" description:"clump (default) drops a few fat clumps for a quick sketch; grid lays out individual plants in rows at true spacing, a layout you could plant from"`
+	PlantedAt       string   `json:"plantedAt" description:"optional planting date for every plop, YYYY-MM-DD; defaults to today"`
+	SeedLotID       *int64   `json:"seedLotId" description:"optional seed lot (from list_seed_lots) this fill uses, so the lot counts it as used"`
 }) (any, error) {
-	// nil: the agent runs server-side with no local day, so the fill dates
+	spec := service.FillSpec{
-	// plops UTC-today like its create_planting does.
+		RegionName: args.Region, PlantID: args.PlantID, SpacingOverride: args.SpacingOverride,
-	return a.svc.FillNamedRegion(ctx, a.actor, args.ObjectID, args.Region, args.PlantID, args.SpacingOverride, service.FillLayout(args.Mode), nil)
+		Layout: service.FillLayout(args.Mode), PlantedAt: a.day(args.PlantedAt), SeedLotID: args.SeedLotID,
+	}
+	rect := []*float64{args.X0CM, args.Y0CM, args.X1CM, args.Y1CM}
+	given := 0
+	for _, v := range rect {
+		if v != nil {
+			given++
+		}
+	}
+	switch {
+	case given == 4 && strings.TrimSpace(args.Region) == "":
+		if !(*args.X0CM < *args.X1CM && *args.Y0CM < *args.Y1CM) {
+			return nil, fmt.Errorf("%w: x0Cm must be west of x1Cm and y0Cm north of y1Cm (-y is north)", domain.ErrInvalidInput)
+		}
+		spec.Region = service.Region{MinX: *args.X0CM, MinY: *args.Y0CM, MaxX: *args.X1CM, MaxY: *args.Y1CM}
+	case given == 0 && strings.TrimSpace(args.Region) != "":
+		// the named region
+	case given == 4:
+		return nil, fmt.Errorf("%w: give either a region name or a rectangle, not both", domain.ErrInvalidInput)
+	case given > 0:
+		return nil, fmt.Errorf("%w: a rectangle needs all four of x0Cm, y0Cm, x1Cm, y1Cm", domain.ErrInvalidInput)
+	default:
+		return nil, fmt.Errorf("%w: say where to fill — a region name, or a rectangle", domain.ErrInvalidInput)
+	}
+	return a.svc.Fill(ctx, a.actor, args.ObjectID, spec)
+}
+
+func (a *adapter) movePlanting(ctx context.Context, args struct {
+	PlantingID int64   `json:"plantingId" description:"plop to move (its id from describe_garden or list_plantings)"`
+	Version    int64   `json:"version" description:"the plop's current version"`
+	XCM        float64 `json:"xCm" description:"new center x in the destination object's local frame (cm; 0,0 = center, -y = north)"`
+	YCM        float64 `json:"yCm" description:"new center y in the destination object's local frame (cm)"`
+	ToObjectID *int64  `json:"toObjectId" description:"optional: another plantable object in the same garden to move it into; omit to move within its current object"`
+}) (any, error) {
+	return a.svc.MovePlanting(ctx, a.actor, args.PlantingID,
+		service.MoveInput{ToObjectID: args.ToObjectID, XCM: args.XCM, YCM: args.YCM}, args.Version)
 }
 
 func (a *adapter) findPlant(ctx context.Context, args struct {
@@ -182,7 +302,7 @@ func (a *adapter) createPlant(ctx context.Context, args struct {
 	Icon           string  `json:"icon" description:"a single emoji to draw it with, e.g. 🧄"`
 	DaysToMaturity *int    `json:"daysToMaturity" description:"optional days from planting to harvest"`
 	SourceURL      string  `json:"sourceUrl" description:"optional http(s) link to where the seed came from"`
-	Vendor         string  `json:"vendor" description:"optional vendor name, e.g. \"Johnny\u0027s Selected Seeds\""`
+	Vendor         string  `json:"vendor" description:"optional vendor name, e.g. \"Johnny's Selected Seeds\""`
 }) (any, error) {
 	return a.svc.CreatePlant(ctx, a.actor, service.PlantInput{
 		Name: args.Name, Category: args.Category, SpacingCM: args.SpacingCM,
@@ -191,29 +311,62 @@ func (a *adapter) createPlant(ctx context.Context, args struct {
 	})
 }
 
+func (a *adapter) updatePlant(ctx context.Context, args struct {
+	PlantID        int64    `json:"plantId" description:"plant to change (the user's own, from find_plant)"`
+	Version        int64    `json:"version" description:"the plant's current version (from find_plant)"`
+	Name           *string  `json:"name" description:"optional new name"`
+	Category       *string  `json:"category" description:"optional: vegetable | herb | flower | fruit | tree_shrub | cover"`
+	SpacingCM      *float64 `json:"spacingCm" description:"optional new mature in-row spacing in cm"`
+	Color          *string  `json:"color" description:"optional new hex color"`
+	DaysToMaturity *int     `json:"daysToMaturity" description:"optional days from planting to harvest"`
+	SourceURL      *string  `json:"sourceUrl" description:"optional http(s) link to where the seed came from"`
+	Vendor         *string  `json:"vendor" description:"optional vendor name"`
+	Notes          *string  `json:"notes" description:"optional free-text notes"`
+}) (any, error) {
+	return a.svc.UpdatePlant(ctx, a.actor, args.PlantID, service.PlantPatch{
+		Name: args.Name, Category: args.Category, SpacingCM: args.SpacingCM, Color: args.Color,
+		SetDays: args.DaysToMaturity != nil, DaysToMaturity: args.DaysToMaturity,
+		SourceURL: args.SourceURL, Vendor: args.Vendor, Notes: args.Notes,
+	}, args.Version)
+}
+
 func (a *adapter) addJournalEntry(ctx context.Context, args struct {
 	GardenID   int64  `json:"gardenId" description:"garden the observation is about"`
 	ObjectID   *int64 `json:"objectId" description:"optional bed the observation is about; omit for a garden-level note"`
 	Body       string `json:"body" description:"what happened, in plain words"`
 	ObservedAt string `json:"observedAt" description:"optional date it happened, YYYY-MM-DD; defaults to today"`
 }) (any, error) {
-	in := service.JournalInput{ObjectID: args.ObjectID, Body: args.Body}
+	return a.svc.CreateJournalEntry(ctx, a.actor, args.GardenID, service.JournalInput{
-	if args.ObservedAt != "" {
+		ObjectID: args.ObjectID, Body: args.Body, ObservedAt: a.day(args.ObservedAt),
-		in.ObservedAt = &args.ObservedAt
+	})
-	}
-	return a.svc.CreateJournalEntry(ctx, a.actor, args.GardenID, in)
 }
 
 func (a *adapter) clearObject(ctx context.Context, args struct {
 	ObjectID int64 `json:"objectId" description:"object to remove all plants from"`
 }) (any, error) {
-	n, err := a.svc.ClearObject(ctx, a.actor, args.ObjectID)
+	n, err := a.svc.ClearPlantings(ctx, a.actor, args.ObjectID, service.ClearOptions{RemovedAt: a.day("")})
 	if err != nil {
 		return nil, err
 	}
 	return map[string]int{"cleared": n}, nil
 }
 
+func (a *adapter) removePlantings(ctx context.Context, args struct {
+	ObjectID int64 `json:"objectId" description:"object to remove the plant from"`
+	PlantID  int64 `json:"plantId" description:"the plant to remove every plop of (from describe_garden)"`
+}) (any, error) {
+	if args.PlantID == 0 {
+		// Left out, it would "remove" plant 0 — nothing — and report success.
+		return nil, fmt.Errorf("%w: plantId is required — say which plant to remove, or use clear_object for all of them", domain.ErrInvalidInput)
+	}
+	n, err := a.svc.ClearPlantings(ctx, a.actor, args.ObjectID,
+		service.ClearOptions{PlantID: &args.PlantID, RemovedAt: a.day("")})
+	if err != nil {
+		return nil, err
+	}
+	return map[string]int{"removed": n}, nil
+}
+
 func (a *adapter) readJournal(ctx context.Context, args struct {
 	GardenID int64  `json:"gardenId" description:"garden whose journal to read"`
 	ObjectID *int64 `json:"objectId" description:"optional bed to narrow to; omit for the whole garden"`
@@ -236,6 +389,61 @@ func (a *adapter) readJournal(ctx context.Context, args struct {
 	return map[string]any{"entries": entries, "hasMore": hasMore}, nil
 }
 
+// historyEntry is one change set as read_history reports it: the row a person
+// would read in the History panel, not the revision snapshots behind it.
+type historyEntry struct {
+	ID      int64  `json:"id"`
+	When    string `json:"when"`
+	Source  string `json:"source"`
+	Who     string `json:"who,omitempty"`
+	Summary string `json:"summary"`
+	Changes string `json:"changes"`
+	Undone  bool   `json:"undone,omitempty"`
+	// UndoOf is the earlier entry this one reverted, when it is itself an undo.
+	UndoOf *int64 `json:"undoOf,omitempty"`
+}
+
+func (a *adapter) readHistory(ctx context.Context, args struct {
+	GardenID int64 `json:"gardenId" description:"garden whose history to read"`
+	Limit    int   `json:"limit" description:"how many of the newest entries to return (default 20, max 100)"`
+	Offset   int   `json:"offset" description:"how many entries to skip; pass the count you've already seen to page when hasMore is true"`
+}) (any, error) {
+	limit := args.Limit
+	if limit <= 0 {
+		limit = 20
+	}
+	sets, hasMore, err := a.svc.GardenHistory(ctx, a.actor, args.GardenID, limit, args.Offset)
+	if err != nil {
+		return nil, err
+	}
+	entries := make([]historyEntry, 0, len(sets))
+	for _, cs := range sets {
+		entries = append(entries, historyEntry{
+			ID: cs.ID, When: cs.CreatedAt, Source: cs.Source, Who: cs.ActorName,
+			Summary: cs.Summary, Changes: describeCounts(cs.Counts),
+			Undone: cs.RevertedByID != nil, UndoOf: cs.RevertsID,
+		})
+	}
+	return map[string]any{"entries": entries, "hasMore": hasMore}, nil
+}
+
+// describeCounts turns a change set's tallies into words: "12 plantings created,
+// 1 object updated".
+func describeCounts(counts []domain.ChangeCount) string {
+	parts := make([]string, 0, len(counts))
+	for _, c := range counts {
+		noun := c.EntityType
+		if c.N != 1 {
+			noun += "s"
+		}
+		parts = append(parts, fmt.Sprintf("%d %s %sd", c.N, noun, c.Op))
+	}
+	if len(parts) == 0 {
+		return "nothing"
+	}
+	return strings.Join(parts, ", ")
+}
+
 func (a *adapter) updateObject(ctx context.Context, args struct {
 	ObjectID    int64    `json:"objectId" description:"object to change"`
 	Version     int64    `json:"version" description:"the object's current version (from describe_garden)"`
@@ -264,9 +472,9 @@ func (a *adapter) removePlanting(ctx context.Context, args struct {
 	PlantingID int64 `json:"plantingId" description:"plop to remove (its id from describe_garden)"`
 	Version    int64 `json:"version" description:"the plop's current version (from describe_garden)"`
 }) (any, error) {
-	// Soft-remove via the service, so removed_at is stamped from the same
+	// Soft-remove via the service, dated the gardener's local day like every
-	// (injectable) clock clear_object uses rather than the adapter's wall clock.
+	// other tool here (the service clock's UTC day when that isn't known).
-	return a.svc.RemovePlanting(ctx, a.actor, args.PlantingID, args.Version)
+	return a.svc.RemovePlanting(ctx, a.actor, args.PlantingID, args.Version, a.day(""))
 }
 
 func (a *adapter) listSeedLots(ctx context.Context, args struct {
@@ -290,3 +498,10 @@ func (a *adapter) recordSeedLot(ctx context.Context, args struct {
 		PackedForYear: args.PackedForYear, Notes: args.Notes,
 	})
 }
+
+func (a *adapter) copyGarden(ctx context.Context, args struct {
+	GardenID int64  `json:"gardenId" description:"garden to duplicate (the user must own it)"`
+	Name     string `json:"name" description:"name for the copy; \"<garden name> — <year>\" makes it that garden's plan for the year"`
+}) (any, error) {
+	return a.svc.CopyGarden(ctx, a.actor, args.GardenID, args.Name)
+}

internal/agent/tools_test.go

@@ -24,7 +24,7 @@ import (
 func TestToolboxScenario(t *testing.T) {
 	ctx := context.Background()
 	svc, ownerID := newAgentTestService(t)
-	box := NewToolbox(svc, ownerID)
+	box := NewToolbox(svc, ownerID, "")
 
 	call := func(name string, args any) llm.ToolResult {
 		t.Helper()
@@ -78,12 +78,17 @@ func TestToolboxScenario(t *testing.T) {
 	if len(desc.Objects) != 1 {
 		t.Fatalf("objects = %d, want 1", len(desc.Objects))
 	}
+	// Plantings come grouped by plant: a group's Where names the region when the
+	// whole group sits in one, and a small group also lists its plops.
 	seen := map[string]map[string]bool{}
-	for _, p := range desc.Objects[0].Plantings {
+	for _, g := range desc.Objects[0].Plantings {
-		if seen[p.Plant] == nil {
+		if seen[g.Plant] == nil {
-			seen[p.Plant] = map[string]bool{}
+			seen[g.Plant] = map[string]bool{}
+		}
+		seen[g.Plant][g.Where] = true
+		for _, p := range g.Each {
+			seen[g.Plant][p.Location] = true
 		}
-		seen[p.Plant][p.Location] = true
 	}
 	if !seen["Garlic"]["NE corner"] {
 		t.Errorf("garlic at %v, want NE corner", seen["Garlic"])
@@ -108,7 +113,7 @@ func TestToolboxScenario(t *testing.T) {
 	if _, err := svc.AddShare(ctx, ownerID, g.ID, "[email protected]", domain.RoleViewer); err != nil {
 		t.Fatalf("share: %v", err)
 	}
-	viewerBox := NewToolbox(svc, viewerUser.ID)
+	viewerBox := NewToolbox(svc, viewerUser.ID, "")
 	vr := viewerBox.Execute(ctx, llm.ToolCall{ID: "2", Name: "fill_region", Arguments: mustJSON(t, map[string]any{
 		"objectId": bed.ID, "region": "all", "plantId": garlic.ID,
 	})})
@@ -148,7 +153,7 @@ func mustPlant(t *testing.T, svc *service.Service, owner int64, name string, spa
 func TestGarlicBedToCucumbers(t *testing.T) {
 	ctx := context.Background()
 	svc, owner := newAgentTestService(t)
-	box := NewToolbox(svc, owner)
+	box := NewToolbox(svc, owner, "")
 
 	call := func(name string, args any) llm.ToolResult {
 		t.Helper()
@@ -233,7 +238,7 @@ func TestGarlicBedToCucumbers(t *testing.T) {
 func TestFindPlantReturnsCandidatesNotAGuess(t *testing.T) {
 	ctx := context.Background()
 	svc, owner := newAgentTestService(t)
-	box := NewToolbox(svc, owner)
+	box := NewToolbox(svc, owner, "")
 
 	mustPlant(t, svc, owner, "German Red Garlic", 15, "🧄")
 
@@ -272,7 +277,7 @@ func TestCreatePlantIsUserScoped(t *testing.T) {
 	if err != nil {
 		t.Fatalf("register: %v", err)
 	}
-	box := NewToolbox(svc, other.ID)
+	box := NewToolbox(svc, other.ID, "")
 
 	raw, _ := json.Marshal(map[string]any{
 		"name": "Painted Mountain Corn", "category": "vegetable",
@@ -310,7 +315,7 @@ func TestCreatePlantIsUserScoped(t *testing.T) {
 func TestJournalToolWritesADatedObservation(t *testing.T) {
 	ctx := context.Background()
 	svc, owner := newAgentTestService(t)
-	box := NewToolbox(svc, owner)
+	box := NewToolbox(svc, owner, "")
 
 	g, err := svc.CreateGarden(ctx, owner, service.GardenInput{Name: "Plot", WidthCM: 2000, HeightCM: 2000})
 	if err != nil {
@@ -354,7 +359,7 @@ func TestJournalToolWritesADatedObservation(t *testing.T) {
 func TestCorrectiveTools(t *testing.T) {
 	ctx := context.Background()
 	svc, owner := newAgentTestService(t)
-	box := NewToolbox(svc, owner)
+	box := NewToolbox(svc, owner, "")
 
 	var gid int64 // set once the garden exists; the describe closure reads it.
 	call := func(name string, args any) llm.ToolResult {
@@ -405,10 +410,10 @@ func TestCorrectiveTools(t *testing.T) {
 		t.Fatalf("place_planting: %s", r.Content)
 	}
 	d = describe()
-	if len(d.Objects[0].Plantings) != 1 {
+	if len(d.Objects[0].Plantings) != 1 || len(d.Objects[0].Plantings[0].Each) != 1 {
-		t.Fatalf("want 1 plop before removal, got %d", len(d.Objects[0].Plantings))
+		t.Fatalf("want 1 plop before removal, got %+v", d.Objects[0].Plantings)
 	}
-	plop := d.Objects[0].Plantings[0]
+	plop := d.Objects[0].Plantings[0].Each[0]
 	if r := call("remove_planting", map[string]any{"plantingId": plop.ID, "version": plop.Version}); r.IsError {
 		t.Fatalf("remove_planting: %s", r.Content)
 	}
@@ -487,3 +492,246 @@ func newAgentTestService(t *testing.T) (*service.Service, int64) {
 	}
 	return svc, owner.ID
 }
+
+// TestToolsFromTheLiveSweep covers what a day of driving the live assistant
+// asked for: grouped describes, whole-group removal, moves that keep the
+// planting date, fills by rectangle, seed attribution, catalog edits, history
+// reads, plan copies — and every date stamped the gardener's local day rather
+// than the server's (UTC) or the model's (a year from its training data).
+func TestToolsFromTheLiveSweep(t *testing.T) {
+	ctx := context.Background()
+	svc, owner := newAgentTestService(t)
+	const today = "2026-08-22"
+	box := NewToolbox(svc, owner, today)
+	call := func(name string, args any) llm.ToolResult {
+		t.Helper()
+		return box.Execute(ctx, llm.ToolCall{ID: "1", Name: name, Arguments: mustJSON(t, args)})
+	}
+	ok := func(name string, args any) string {
+		t.Helper()
+		r := call(name, args)
+		if r.IsError {
+			t.Fatalf("%s: %s", name, r.Content)
+		}
+		return r.Content
+	}
+	decode := func(raw string, into any) {
+		t.Helper()
+		if err := json.Unmarshal([]byte(raw), into); err != nil {
+			t.Fatalf("decode %v: %s", err, raw)
+		}
+	}
+
+	g, err := svc.CreateGarden(ctx, owner, service.GardenInput{Name: "Plot", WidthCM: 2000, HeightCM: 2000, UnitPref: domain.UnitImperial})
+	if err != nil {
+		t.Fatalf("garden: %v", err)
+	}
+	garlic := mustPlant(t, svc, owner, "Garlic", 15, "🧄")
+	beet := mustPlant(t, svc, owner, "Beet", 10, "🌱")
+	tomato := mustPlant(t, svc, owner, "Cherokee Purple", 60, "🍅")
+	bed, err := svc.CreateObject(ctx, owner, g.ID, service.ObjectInput{Kind: domain.KindBed, Name: "South bed", XCM: 1000, YCM: 1000, WidthCM: 240, HeightCM: 120})
+	if err != nil {
+		t.Fatalf("bed: %v", err)
+	}
+	other, err := svc.CreateObject(ctx, owner, g.ID, service.ObjectInput{Kind: domain.KindBed, Name: "North bed", XCM: 1000, YCM: 300, WidthCM: 240, HeightCM: 120})
+	if err != nil {
+		t.Fatalf("other bed: %v", err)
+	}
+	lot, err := svc.CreateSeedLot(ctx, owner, service.SeedLotInput{PlantID: beet.ID, Quantity: 500, Unit: "seeds"})
+	if err != nil {
+		t.Fatalf("lot: %v", err)
+	}
+
+	// fill_region by rectangle (the middle third of the bed's width), in grid mode,
+	// charged to the lot, dated today by default.
+	ok("fill_region", map[string]any{
+		"objectId": bed.ID, "plantId": beet.ID, "mode": "grid", "seedLotId": lot.ID,
+		"x0Cm": -40.0, "y0Cm": -60.0, "x1Cm": 40.0, "y1Cm": 60.0,
+	})
+	// Neither a region nor a full rectangle is a mistake the model can read.
+	if r := call("fill_region", map[string]any{"objectId": bed.ID, "plantId": beet.ID, "x0Cm": -40.0}); !r.IsError || !strings.Contains(r.Content, "x0Cm, y0Cm, x1Cm, y1Cm") {
+		t.Errorf("half a rectangle: %+v, want a readable refusal", r)
+	}
+	if r := call("fill_region", map[string]any{"objectId": bed.ID, "plantId": beet.ID}); !r.IsError {
+		t.Error("fill_region with nowhere to fill succeeded")
+	}
+	// An inverted rectangle is refused with its corners named, before the service
+	// sees it — the mistake a model makes is swapping which way is north.
+	if r := call("fill_region", map[string]any{"objectId": bed.ID, "plantId": beet.ID, "x0Cm": 40.0, "y0Cm": -60.0, "x1Cm": -40.0, "y1Cm": 60.0}); !r.IsError || !strings.Contains(r.Content, "west of") {
+		t.Errorf("inverted rectangle: %+v, want a refusal naming the corners", r)
+	}
+	// remove_plantings without a plant would "remove" plant 0 — nothing.
+	if r := call("remove_plantings", map[string]any{"objectId": bed.ID}); !r.IsError || !strings.Contains(r.Content, "plantId") {
+		t.Errorf("remove_plantings with no plant: %+v, want a refusal asking which plant", r)
+	}
+	// place_planting without a radius → one plant at half the spacing; two garlic
+	// cloves along the north edge, dated today.
+	ok("place_planting", map[string]any{"objectId": bed.ID, "plantId": garlic.ID, "xCm": -100, "yCm": -50})
+	ok("place_planting", map[string]any{"objectId": bed.ID, "plantId": garlic.ID, "xCm": 100, "yCm": -50})
+	// And a tomato planted back in May, with an explicit date.
+	ok("place_planting", map[string]any{"objectId": bed.ID, "plantId": tomato.ID, "xCm": 0, "yCm": 0, "plantedAt": "2026-05-20"})
+
+	// describe_garden: one group per plant, dated; only the small ones listed.
+	var d service.DescribeResult
+	groups := func() map[string]service.DescribeGroup {
+		t.Helper()
+		decode(ok("describe_garden", map[string]any{"gardenId": g.ID}), &d)
+		out := map[string]service.DescribeGroup{}
+		for _, o := range d.Objects {
+			if o.ID == bed.ID {
+				for _, gr := range o.Plantings {
+					out[gr.Plant] = gr
+				}
+			}
+		}
+		return out
+	}
+	gs := groups()
+	beets := gs["Beet"]
+	if beets.Plops <= 8 || beets.Each != nil {
+		t.Errorf("beets: %d plops, each=%v; want a large group with no per-plop listing", beets.Plops, beets.Each)
+	}
+	if beets.PlantedAt != today || beets.Plants != beets.Plops {
+		t.Errorf("beets plantedAt %q plants %d; want today and one plant per grid plop", beets.PlantedAt, beets.Plants)
+	}
+	if !strings.Contains(beets.Where, "cm from the centre") {
+		t.Errorf("beets where = %q, want the bounding box of a middle-third fill", beets.Where)
+	}
+	cloves := gs["Garlic"]
+	if cloves.Plops != 2 || len(cloves.Each) != 2 || cloves.Where != "north half" || cloves.PlantedAt != today {
+		t.Errorf("garlic group = %+v, want 2 listed plops in the north half, dated today", cloves)
+	}
+	if r := cloves.Each[0].RadiusCM; r != 7.5 {
+		t.Errorf("a clove placed without a radius got %v, want spacing/2 = 7.5", r)
+	}
+	tom := gs["Cherokee Purple"]
+	if tom.Plops != 1 || tom.Where != "center" || tom.PlantedAt != "2026-05-20" {
+		t.Errorf("tomato group = %+v, want one plop at the center dated 2026-05-20", tom)
+	}
+
+	// The lot counts the beets as used.
+	var lots []struct {
+		Used      float64 `json:"used"`
+		Remaining float64 `json:"remaining"`
+	}
+	decode(ok("list_seed_lots", map[string]any{"plantId": beet.ID}), &lots)
+	if len(lots) != 1 || lots[0].Used != float64(beets.Plants) || lots[0].Remaining != 500-float64(beets.Plants) {
+		t.Errorf("lots = %+v, want %d used of 500", lots, beets.Plants)
+	}
+
+	// list_plantings spells the big group out, narrowed to one plant.
+	var listed []service.DescribePlanting
+	decode(ok("list_plantings", map[string]any{"objectId": bed.ID, "plantId": beet.ID}), &listed)
+	if len(listed) != beets.Plops {
+		t.Errorf("list_plantings: %d beets, want %d", len(listed), beets.Plops)
+	}
+
+	// move_planting: the tomato to the north bed, date kept; a within-bed move too.
+	var moved domain.Planting
+	decode(ok("move_planting", map[string]any{
+		"plantingId": tom.Each[0].ID, "version": tom.Each[0].Version, "toObjectId": other.ID, "xCm": 10.0, "yCm": -20.0,
+	}), &moved)
+	if moved.ObjectID != other.ID || moved.PlantedAt == nil || *moved.PlantedAt != "2026-05-20" {
+		t.Errorf("moved tomato = %+v, want it in the north bed with its May date", moved)
+	}
+	decode(ok("move_planting", map[string]any{
+		"plantingId": cloves.Each[0].ID, "version": cloves.Each[0].Version, "xCm": -110.0, "yCm": -55.0,
+	}), &moved)
+	if moved.ObjectID != bed.ID || moved.XCM != -110 {
+		t.Errorf("within-bed move = %+v, want the same bed at x=-110", moved)
+	}
+
+	// remove_plantings: the beets out, the garlic stays — dated today.
+	var removed struct {
+		Removed int `json:"removed"`
+	}
+	decode(ok("remove_plantings", map[string]any{"objectId": bed.ID, "plantId": beet.ID}), &removed)
+	if removed.Removed != beets.Plops {
+		t.Errorf("remove_plantings removed %d, want the %d beets", removed.Removed, beets.Plops)
+	}
+	gs = groups()
+	if _, still := gs["Beet"]; still || gs["Garlic"].Plops != 2 {
+		t.Errorf("after remove_plantings the bed has %+v, want the garlic only", gs)
+	}
+	var pulled domain.Planting
+	decode(ok("remove_planting", map[string]any{"plantingId": gs["Garlic"].Each[0].ID, "version": gs["Garlic"].Each[0].Version}), &pulled)
+	if pulled.RemovedAt == nil || *pulled.RemovedAt != today {
+		t.Errorf("remove_planting dated the removal %v, want today %s", pulled.RemovedAt, today)
+	}
+
+	// read_history sees all of that, newest first, and marks what was undone.
+	var hist struct {
+		Entries []historyEntry `json:"entries"`
+		HasMore bool           `json:"hasMore"`
+	}
+	decode(ok("read_history", map[string]any{"gardenId": g.ID, "limit": 3}), &hist)
+	if len(hist.Entries) != 3 || !hist.HasMore {
+		t.Fatalf("read_history = %d entries, hasMore=%v; want 3 and more", len(hist.Entries), hist.HasMore)
+	}
+	if e := hist.Entries[1]; !strings.HasPrefix(e.Summary, "Removed Beet from South bed") || !strings.Contains(e.Changes, "planting") || e.Undone {
+		t.Errorf("entry = %+v, want the beet removal, not undone", e)
+	}
+	if _, conflicts, err := svc.RevertChangeSet(ctx, owner, hist.Entries[1].ID, domain.SourceUI); err != nil || len(conflicts) != 0 {
+		t.Fatalf("undo: err=%v conflicts=%+v", err, conflicts)
+	}
+	decode(ok("read_history", map[string]any{"gardenId": g.ID, "limit": 3}), &hist)
+	if hist.Entries[0].UndoOf == nil || !hist.Entries[2].Undone {
+		t.Errorf("after an undo: newest = %+v, undone = %+v; want the revert to point at the removal, and the removal marked undone", hist.Entries[0], hist.Entries[2])
+	}
+
+	// update_plant on the user's own plant; a built-in is refused.
+	var matches []struct {
+		ID      int64 `json:"id"`
+		Version int64 `json:"version"`
+	}
+	decode(ok("find_plant", map[string]any{"query": "cherokee"}), &matches)
+	var updated domain.Plant
+	decode(ok("update_plant", map[string]any{"plantId": matches[0].ID, "version": matches[0].Version, "daysToMaturity": 75}), &updated)
+	if updated.DaysToMaturity == nil || *updated.DaysToMaturity != 75 || updated.Name != "Cherokee Purple" {
+		t.Errorf("update_plant = %+v, want days 75 and the name untouched", updated)
+	}
+	decode(ok("find_plant", map[string]any{"query": "basil"}), &matches)
+	if r := call("update_plant", map[string]any{"plantId": matches[0].ID, "version": matches[0].Version, "daysToMaturity": 60}); !r.IsError {
+		t.Error("update_plant changed a built-in")
+	}
+
+	// add_journal_entry is dated today unless told otherwise.
+	ok("add_journal_entry", map[string]any{"gardenId": g.ID, "body": "aphids on the beets"})
+	entries, _, err := svc.ListJournal(ctx, owner, g.ID, service.JournalQuery{})
+	if err != nil {
+		t.Fatalf("ListJournal: %v", err)
+	}
+	if len(entries) != 1 || entries[0].ObservedAt != today {
+		t.Errorf("journal = %+v, want one entry observed %s", entries, today)
+	}
+
+	// copy_garden makes next year's plan: a whole copy under the plan name.
+	var plan domain.Garden
+	decode(ok("copy_garden", map[string]any{"gardenId": g.ID, "name": "Plot — 2027"}), &plan)
+	if plan.Name != "Plot — 2027" || plan.ID == g.ID {
+		t.Errorf("copy_garden = %+v, want a new garden named for the plan", plan)
+	}
+	decode(ok("describe_garden", map[string]any{"gardenId": plan.ID}), &d)
+	if len(d.Objects) != 2 {
+		t.Errorf("the plan copy has %d objects, want the source's 2", len(d.Objects))
+	}
+}
+
+// TestToolsDefaultToTheServiceDayWithoutOne — a toolbox built with no local day
+// (a bare API caller) still dates everything: the service's UTC today.
+func TestToolsDefaultToTheServiceDayWithoutOne(t *testing.T) {
+	a := &adapter{today: ""}
+	if d := a.day(""); d != nil {
+		t.Errorf("no day at all → %q, want nil (the service default)", *d)
+	}
+	if d := a.day(" 2026-01-02 "); d == nil || *d != "2026-01-02" {
+		t.Errorf("an explicit day → %v, want it trimmed", d)
+	}
+	a.today = "2026-08-22"
+	if d := a.day(""); d == nil || *d != "2026-08-22" {
+		t.Errorf("the gardener's day → %v, want 2026-08-22", d)
+	}
+	if d := a.day("2026-05-20"); d == nil || *d != "2026-05-20" {
+		t.Errorf("an explicit day beats the default: %v", d)
+	}
+}

internal/api/agent.go

@@ -35,6 +35,21 @@ const keepAliveInterval = 20 * time.Second
 type chatRequest struct {
 	GardenID int64  `json:"gardenId" binding:"required"`
 	Message  string `json:"message" binding:"required"`
+	// Today is the sender's local date (YYYY-MM-DD): what the assistant tells the
+	// model the date is, and what the turn's plantings, removals and journal
+	// entries are dated. The UI always sends it, for the same reason it sends
+	// plantedAt on a fill — a gardener placing at 9 pm in Ohio planted today, not
+	// UTC's tomorrow. Optional for bare API callers, who get the server's UTC day.
+	Today string `json:"today"`
+}
+
+// validToday accepts an empty date or one in YYYY-MM-DD form.
+func validToday(s string) bool {
+	if s == "" {
+		return true
+	}
+	_, err := time.Parse("2006-01-02", s)
+	return err == nil
 }
 
 // chatEvent is one server-sent event. Exactly one field is set.
@@ -60,17 +75,23 @@ func (h *handlers) agentChat(c *gin.Context) {
 	// state, not a missing route: answer it plainly rather than 404ing a path
 	// that exists. Loaded once here so a settings-driven swap mid-request can't
 	// make it flip between the guard and the Run call.
-	runner := h.agent.get()
+	// The body is checked before the runner: a malformed request is a 400
-	if runner == nil {
+	// whether or not there is a model behind the route, so a client can't
-		writeAPIError(c, http.StatusServiceUnavailable, "AGENT_DISABLED", "the garden assistant isn't enabled on this instance")
+	// mistake its own bad date for the assistant being off.
-		return
-	}
-
 	var req chatRequest
 	if err := c.ShouldBindJSON(&req); err != nil {
 		writeAPIError(c, http.StatusBadRequest, "INVALID_INPUT", "a gardenId and a message are required")
 		return
 	}
+	if !validToday(req.Today) {
+		writeAPIError(c, http.StatusBadRequest, "INVALID_INPUT", "today must be a YYYY-MM-DD date")
+		return
+	}
+	runner := h.agent.get()
+	if runner == nil {
+		writeAPIError(c, http.StatusServiceUnavailable, "AGENT_DISABLED", "the garden assistant isn't enabled on this instance")
+		return
+	}
 	actor := mustActor(c)
 
 	history, err := h.svc.AgentHistory(c.Request.Context(), actor.ID, req.GardenID)
@@ -88,7 +109,7 @@ func (h *handlers) agentChat(c *gin.Context) {
 	stopBeat := stream.keepAlive(keepAliveInterval)
 	defer stopBeat()
 
-	turn, err := runner.Run(c.Request.Context(), actor.ID, req.GardenID, req.Message,
+	turn, err := runner.Run(c.Request.Context(), actor.ID, req.GardenID, req.Message, req.Today,
 		replayHistory(history),
 		func(s mdagent.Step) {
 			send(chatEvent{Step: &stepEvent{Index: s.Index, Tools: toolNames(s)}})

internal/api/agent_test.go

@@ -47,3 +47,27 @@ func TestAgentDisabledWithoutAKey(t *testing.T) {
 		t.Errorf("editor load: status %d, want 200 — an unconfigured agent must not break the app", w.Code)
 	}
 }
+
+// TestChatRejectsAMalformedToday — the sender's local date is validated before
+// anything else about the request, assistant or no assistant: a bad body is a
+// 400 either way, so a client can't mistake its own bad date for the assistant
+// being off.
+func TestChatRejectsAMalformedToday(t *testing.T) {
+	r := authEngine(t, localCfg())
+	cookie := registerAndCookie(t, r, "[email protected]")
+	gid := createGardenAPI(t, r, cookie, "G")
+
+	w := doJSON(t, r, http.MethodPost, "/api/v1/agent/chat",
+		map[string]any{"gardenId": gid, "message": "plant garlic", "today": "Aug 22"}, cookie)
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("chat with today=%q: status %d, want 400", "Aug 22", w.Code)
+	}
+	// A well-formed date (or none) gets past validation to the runner check.
+	for _, today := range []string{"2026-08-22", ""} {
+		w := doJSON(t, r, http.MethodPost, "/api/v1/agent/chat",
+			map[string]any{"gardenId": gid, "message": "plant garlic", "today": today}, cookie)
+		if w.Code != http.StatusServiceUnavailable {
+			t.Errorf("chat with today=%q: status %d, want 503 (no runner configured)", today, w.Code)
+		}
+	}
+}

internal/service/ops.go

@@ -2,6 +2,7 @@ package service
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"log/slog"
 	"math"
@@ -179,39 +180,83 @@ func validFillLayout(l FillLayout) (FillLayout, bool) {
 // when nil — the UI always sends its local day, so the default is for API and
 // agent callers. Returns the plops it created.
 func (s *Service) FillRegion(ctx context.Context, actorID, objectID int64, region Region, plantID int64, spacingOverride *float64, layout FillLayout, plantedAt *string) ([]domain.Planting, error) {
+	return s.Fill(ctx, actorID, objectID, FillSpec{
+		Region: region, PlantID: plantID, SpacingOverride: spacingOverride, Layout: layout, PlantedAt: plantedAt,
+	})
+}
+
+// FillSpec is everything a fill needs besides the object it fills: where (a
+// compass RegionName, or an explicit Region in the object's local frame when the
+// name is empty), what, and how.
+type FillSpec struct {
+	// RegionName is a compass name for NamedRegion ("ne", "south half", "all").
+	// When it is empty, Region is used as given.
+	RegionName string
+	Region     Region
+	PlantID    int64
+	// SpacingOverride replaces the plant's own spacing for this fill, in cm.
+	SpacingOverride *float64
+	// Layout is clump (the default) or grid; see FillLayout.
+	Layout FillLayout
+	// PlantedAt dates every plop the fill makes (YYYY-MM-DD). nil means the
+	// service's UTC today; a caller that knows the person's local day sends it.
+	PlantedAt *string
+	// SeedLotID attributes every plop to one of the actor's seed lots, so the lot
+	// can report what it has left. Optional.
+	SeedLotID *int64
+}
+
+// Fill plants one plant across part of an object the actor can edit, per spec.
+// FillRegion and FillNamedRegion are the two older spellings of it.
+func (s *Service) Fill(ctx context.Context, actorID, objectID int64, spec FillSpec) ([]domain.Planting, error) {
 	o, _, err := s.objectForRole(ctx, actorID, objectID, roleEditor)
 	if err != nil {
 		return nil, err
 	}
-	return s.fillLoaded(ctx, actorID, o, region, plantID, spacingOverride, layout, plantedAt)
+	region := spec.Region
+	if strings.TrimSpace(spec.RegionName) != "" {
+		if region, err = NamedRegion(o, spec.RegionName); err != nil {
+			return nil, err
+		}
+	} else if !(region.MinX < region.MaxX && region.MinY < region.MaxY) {
+		// A zero or inverted rectangle is a caller that said nothing about where
+		// — not a request for the one plop hexCenters would put at its middle.
+		return nil, fmt.Errorf("%w: the fill rectangle is empty", domain.ErrInvalidInput)
+	}
+	return s.fillLoaded(ctx, actorID, o, region, spec)
 }
 
-// fillLoaded is the shared body of FillRegion/FillNamedRegion given an object
+// fillLoaded is the body of Fill given an object already loaded and authorized
-// already loaded and authorized (roleEditor). It validates the layout, rejects a
+// (roleEditor) and its region resolved. It validates the layout, rejects a
 // non-finite region, clamps the region to the object's bounds, refuses fills over
 // maxFillPlops, and inserts the whole batch in one transaction rather than one
 // round-trip per plop.
-func (s *Service) fillLoaded(ctx context.Context, actorID int64, o *domain.GardenObject, region Region, plantID int64, spacingOverride *float64, layout FillLayout, plantedAt *string) ([]domain.Planting, error) {
+func (s *Service) fillLoaded(ctx context.Context, actorID int64, o *domain.GardenObject, region Region, spec FillSpec) ([]domain.Planting, error) {
 	if !o.Plantable {
 		return nil, domain.ErrInvalidInput
 	}
-	if !validDatePtr(plantedAt) {
+	if !validDatePtr(spec.PlantedAt) {
 		return nil, fmt.Errorf("%w: plantedAt must be a YYYY-MM-DD date", domain.ErrInvalidInput)
 	}
-	layout, ok := validFillLayout(layout)
+	layout, ok := validFillLayout(spec.Layout)
 	if !ok {
 		return nil, domain.ErrInvalidInput
 	}
-	plant, err := s.visiblePlant(ctx, actorID, plantID)
+	plant, err := s.visiblePlant(ctx, actorID, spec.PlantID)
 	if err != nil {
 		return nil, err
 	}
+	// Checked before anything is planted, as CreatePlanting does: a lot of the
+	// wrong variety, or someone else's, refuses the whole fill.
+	if err := s.checkSeedLotForPlanting(ctx, actorID, spec.SeedLotID, spec.PlantID); err != nil {
+		return nil, err
+	}
 	spacing := plant.SpacingCM
-	if spacingOverride != nil {
+	if spec.SpacingOverride != nil {
-		if !isFinite(*spacingOverride) || *spacingOverride < minPlantSpacingCM || *spacingOverride > maxPlantSpacingCM {
+		if !isFinite(*spec.SpacingOverride) || *spec.SpacingOverride < minPlantSpacingCM || *spec.SpacingOverride > maxPlantSpacingCM {
 			return nil, domain.ErrInvalidInput
 		}
-		spacing = *spacingOverride
+		spacing = *spec.SpacingOverride
 	}
 	radius := plopRadiusFor(spacing, layout)
 	if !isFinite(radius) || radius <= 0 {
@@ -231,6 +276,14 @@ func (s *Service) fillLoaded(ctx context.Context, actorID int64, o *domain.Garde
 	}
 
 	region = region.clampTo(o.WidthCM/2, o.HeightCM/2)
+	if region.MaxX <= region.MinX || region.MaxY <= region.MinY {
+		// An explicit rectangle that misses the object, or only touches its edge.
+		// Planting nothing and reporting success would read as "done" to a caller
+		// that aimed at the wrong coordinates (typically the agent mixing up the
+		// garden frame and the object's local one) — and a rectangle clamped to a
+		// line would get hexCenters' one-plop-in-the-middle rule, on the edge.
+		return nil, fmt.Errorf("%w: the region lies outside the object", domain.ErrInvalidInput)
+	}
 	centers, total := hexCenters(region, radius, edgeInset(radius, spacing, layout), maxFillPlops)
 	if total > maxFillPlops {
 		return nil, domain.ErrInvalidInput // region too large for this spacing; ask for less
@@ -241,8 +294,8 @@ func (s *Service) fillLoaded(ctx context.Context, actorID int64, o *domain.Garde
 		return nil, err
 	}
 	plantedOn := s.now().UTC().Format(dateLayout)
-	if plantedAt != nil {
+	if spec.PlantedAt != nil {
-		plantedOn = *plantedAt
+		plantedOn = *spec.PlantedAt
 	}
 	batch := make([]*domain.Planting, 0, len(centers))
 	// Only the plops that were ALREADY here can cover a candidate: every plop this
@@ -255,7 +308,7 @@ func (s *Service) fillLoaded(ctx context.Context, actorID int64, o *domain.Garde
 		if coveredByExisting(c.x, c.y, radius, existing) {
 			continue
 		}
-		batch = append(batch, &domain.Planting{ObjectID: o.ID, PlantID: plantID, XCM: c.x, YCM: c.y, RadiusCM: radius, PlantedAt: &plantedOn})
+		batch = append(batch, &domain.Planting{ObjectID: o.ID, PlantID: spec.PlantID, XCM: c.x, YCM: c.y, RadiusCM: radius, PlantedAt: &plantedOn, SeedLotID: spec.SeedLotID})
 	}
 	created, err := s.store.CreatePlantings(ctx, batch)
 	if err != nil {
@@ -385,15 +438,14 @@ func coveredByExisting(x, y, radius float64, existing []domain.Planting) bool {
 // instead of a resolved Region — the ergonomic form for agent tools, which don't
 // hold the object's geometry. It resolves the name against the object, then fills.
 func (s *Service) FillNamedRegion(ctx context.Context, actorID, objectID int64, regionName string, plantID int64, spacingOverride *float64, layout FillLayout, plantedAt *string) ([]domain.Planting, error) {
-	o, _, err := s.objectForRole(ctx, actorID, objectID, roleEditor)
+	if strings.TrimSpace(regionName) == "" {
-	if err != nil {
+		// Fill would read a blank name as "use the (zero) Region" and plant
-		return nil, err
+		// nothing; here a blank name is the caller's mistake, as it always was.
+		return nil, domain.ErrInvalidInput
 	}
-	region, err := NamedRegion(o, regionName)
+	return s.Fill(ctx, actorID, objectID, FillSpec{
-	if err != nil {
+		RegionName: regionName, PlantID: plantID, SpacingOverride: spacingOverride, Layout: layout, PlantedAt: plantedAt,
-		return nil, err
+	})
-	}
-	return s.fillLoaded(ctx, actorID, o, region, plantID, spacingOverride, layout, plantedAt)
 }
 
 // ClearObject soft-removes every active plop in an object the actor can edit (one
@@ -402,10 +454,29 @@ func (s *Service) FillNamedRegion(ctx context.Context, actorID, objectID int64,
 // non-plantable after it was planted must still be clearable (you can always
 // remove existing plops, only not add new ones).
 func (s *Service) ClearObject(ctx context.Context, actorID, objectID int64) (int, error) {
+	return s.ClearPlantings(ctx, actorID, objectID, ClearOptions{})
+}
+
+// ClearOptions narrows ClearPlantings.
+type ClearOptions struct {
+	// PlantID limits the clear to one plant — "pull the beets out, leave the
+	// garlic" — nil clears every plant.
+	PlantID *int64
+	// RemovedAt is the removal date (YYYY-MM-DD). nil means the service's UTC
+	// today; a caller that knows the person's local day sends it.
+	RemovedAt *string
+}
+
+// ClearPlantings is ClearObject with options: all of an object's active plops, or
+// only one plant's. The whole clear is one change set either way.
+func (s *Service) ClearPlantings(ctx context.Context, actorID, objectID int64, opts ClearOptions) (int, error) {
 	o, g, err := s.objectForRole(ctx, actorID, objectID, roleEditor)
 	if err != nil {
 		return 0, err
 	}
+	if !validDatePtr(opts.RemovedAt) {
+		return 0, fmt.Errorf("%w: removedAt must be a YYYY-MM-DD date", domain.ErrInvalidInput)
+	}
 	// Snapshot the rows the bulk UPDATE is about to touch, since it reports only a
 	// count — then clear exactly those ids. Clearing "every active plop" instead
 	// would let a plop created between this read and the UPDATE be removed with no
@@ -414,12 +485,32 @@ func (s *Service) ClearObject(ctx context.Context, actorID, objectID int64) (int
 	if err != nil {
 		return 0, err
 	}
+	what := "" // names the plant in the summary when the clear is for one plant
+	if opts.PlantID != nil {
+		only := make([]domain.Planting, 0, len(before))
+		for i := range before {
+			if before[i].PlantID == *opts.PlantID {
+				only = append(only, before[i])
+			}
+		}
+		before = only
+		// The summary is read by a person, so name the plant, not its id. A plant
+		// that no longer exists just goes unnamed.
+		if plant, err := s.store.GetPlant(ctx, *opts.PlantID); err == nil {
+			what = plant.Name
+		} else if !errors.Is(err, domain.ErrNotFound) {
+			return 0, err
+		}
+	}
 	ids := make([]int64, 0, len(before))
 	for i := range before {
 		ids = append(ids, before[i].ID)
 	}
-	today := s.now().UTC().Format(dateLayout)
+	removedOn := s.now().UTC().Format(dateLayout)
-	n, err := s.store.ClearObjectPlantings(ctx, objectID, today, ids)
+	if opts.RemovedAt != nil {
+		removedOn = *opts.RemovedAt
+	}
+	n, err := s.store.ClearObjectPlantings(ctx, objectID, removedOn, ids)
 	if err != nil || n == 0 {
 		return n, err
 	}
@@ -447,7 +538,14 @@ func (s *Service) ClearObject(ctx context.Context, actorID, objectID int64) (int
 		}
 		changes = append(changes, changeUpdate(domain.EntityPlanting, b.ID, &b, a))
 	}
-	s.record(ctx, g.ID, actorID, fmt.Sprintf("Cleared %s (%d plantings)", objectLabel(o), n), changes...)
+	summary := fmt.Sprintf("Cleared %s (%d plantings)", objectLabel(o), n)
+	if opts.PlantID != nil {
+		if what == "" {
+			what = "plantings"
+		}
+		summary = fmt.Sprintf("Removed %s from %s (%d plantings)", what, objectLabel(o), n)
+	}
+	s.record(ctx, g.ID, actorID, summary, changes...)
 	return n, nil
 }
 
@@ -461,39 +559,75 @@ type DescribeResult struct {
 	Objects  []DescribeObject `json:"objects"`
 }
 
-// DescribeObject is one object plus its active plantings, for DescribeResult.
+// DescribeObject is one object plus its active plantings grouped by plant, for
-// Version is included so an agent can move/edit the object (the mutation guard).
+// DescribeResult. Version is included so an agent can move/edit the object (the
+// mutation guard).
 type DescribeObject struct {
-	ID          int64              `json:"id"`
+	ID          int64           `json:"id"`
-	Kind        string             `json:"kind"`
+	Kind        string          `json:"kind"`
-	Name        string             `json:"name"`
+	Name        string          `json:"name"`
-	Shape       string             `json:"shape"`
+	Shape       string          `json:"shape"`
-	WidthCM     float64            `json:"widthCm"`
+	WidthCM     float64         `json:"widthCm"`
-	HeightCM    float64            `json:"heightCm"`
+	HeightCM    float64         `json:"heightCm"`
-	XCM         float64            `json:"xCm"`
+	XCM         float64         `json:"xCm"`
-	YCM         float64            `json:"yCm"`
+	YCM         float64         `json:"yCm"`
-	RotationDeg float64            `json:"rotationDeg"`
+	RotationDeg float64         `json:"rotationDeg"`
-	Plantable   bool               `json:"plantable"`
+	Plantable   bool            `json:"plantable"`
-	Version     int64              `json:"version"`
+	Version     int64           `json:"version"`
-	Plantings   []DescribePlanting `json:"plantings"`
+	Plantings   []DescribeGroup `json:"plantings"`
 }
 
-// DescribePlanting is one plop with a rough compass location, for DescribeResult.
+// maxListedPlops is the largest group DescribeGroup.Each spells out plop by plop.
-// ID + Version are included so an agent can address a single plop — remove it or
+// Up to it, a group is a handful of placements someone may address one at a time
-// move it — the same way DescribeObject.Version lets it edit an object.
+// ("pull the basil out of the corner"). Past it — a grid-filled bed is hundreds —
+// the ids are noise that costs a model more than it informs, and the group is
+// addressed as a whole (ClearPlantings) or listed on demand (ListObjectPlantings).
+// The live instance's first describe of a grid-filled garden was ~450 plop
+// entries, on every turn.
+const maxListedPlops = 8
+
+// DescribeGroup summarizes every active plop of one plant in an object — the
+// unit a person talks about ("the cucumbers in the west bed") — with the count,
+// a rough location, and when it went in.
+type DescribeGroup struct {
+	PlantID int64  `json:"plantId"`
+	Plant   string `json:"plant"`
+	// Plops is how many placements make up the group; Plants the effective plant
+	// count across them (explicit counts, else derived from area and spacing).
+	Plops  int `json:"plops"`
+	Plants int `json:"plants"`
+	// Where is a rough location: a compass region when the group sits in one
+	// ("north half", "NE corner"), "throughout" when it spans the object, a short
+	// list of locations, or — for anything else — its bounding box in local cm.
+	Where string `json:"where"`
+	// PlantedAt is the planting date, or "first…last" when the plops differ.
+	PlantedAt string `json:"plantedAt,omitempty"`
+	// DaysToMaturity is the plant's, when the catalog knows it — with PlantedAt,
+	// enough to say when the harvest is due.
+	DaysToMaturity *int `json:"daysToMaturity,omitempty"`
+	// Each lists the plops individually (id, version, location) only when the
+	// group has at most maxListedPlops of them.
+	Each []DescribePlanting `json:"each,omitempty"`
+}
+
+// DescribePlanting is one plop with a rough compass location. ID + Version let
+// an agent address a single plop — remove it or move it — the same way
+// DescribeObject.Version lets it edit an object.
 type DescribePlanting struct {
-	ID       int64   `json:"id"`
+	ID        int64   `json:"id"`
-	Version  int64   `json:"version"`
+	Version   int64   `json:"version"`
-	PlantID  int64   `json:"plantId"`
+	PlantID   int64   `json:"plantId"`
-	Plant    string  `json:"plant"`
+	Plant     string  `json:"plant"`
-	Count    int     `json:"count"`
+	Count     int     `json:"count"`
-	Location string  `json:"location"`
+	Location  string  `json:"location"`
-	RadiusCM float64 `json:"radiusCm"`
+	RadiusCM  float64 `json:"radiusCm"`
+	PlantedAt string  `json:"plantedAt,omitempty"`
 }
 
 // DescribeGarden returns a structured summary — dimensions, objects, and each
-// object's active plantings (plant, effective count, rough location) — for a
+// object's active plantings grouped by plant (count, rough location, planting
-// garden the actor can view. Built on GardenFull so it inherits the ACL check.
+// date) — for a garden the actor can view. Built on GardenFull so it inherits
+// the ACL check.
 func (s *Service) DescribeGarden(ctx context.Context, actorID, gardenID int64) (*DescribeResult, error) {
 	full, err := s.GardenFull(ctx, actorID, gardenID, nil)
 	if err != nil {
@@ -517,33 +651,189 @@ func (s *Service) DescribeGarden(ctx context.Context, actorID, gardenID int64) (
 		UnitPref: full.Garden.UnitPref,
 		Objects:  make([]DescribeObject, 0, len(full.Objects)),
 	}
-	for _, o := range full.Objects {
+	for i := range full.Objects {
-		do := DescribeObject{
+		o := &full.Objects[i]
+		res.Objects = append(res.Objects, DescribeObject{
 			ID: o.ID, Kind: o.Kind, Name: o.Name, Shape: o.Shape,
 			WidthCM: o.WidthCM, HeightCM: o.HeightCM, XCM: o.XCM, YCM: o.YCM,
 			RotationDeg: o.RotationDeg, Plantable: o.Plantable, Version: o.Version,
-			Plantings: []DescribePlanting{},
+			Plantings: describeGroups(o, plopsByObject[o.ID], plantByID),
-		}
+		})
-		for _, pl := range plopsByObject[o.ID] {
-			count := pl.DerivedCount
-			if pl.Count != nil {
-				count = *pl.Count
-			}
-			do.Plantings = append(do.Plantings, DescribePlanting{
-				ID:       pl.ID,
-				Version:  pl.Version,
-				PlantID:  pl.PlantID,
-				Plant:    plantByID[pl.PlantID].Name,
-				Count:    count,
-				Location: describeLocation(pl.XCM, pl.YCM),
-				RadiusCM: pl.RadiusCM,
-			})
-		}
-		res.Objects = append(res.Objects, do)
 	}
 	return res, nil
 }
 
+// ListObjectPlantings lists an object's active plops one by one — the ids that
+// DescribeGarden summarizes away for a large group. plantID narrows it to one
+// plant. Viewer role, like DescribeGarden.
+func (s *Service) ListObjectPlantings(ctx context.Context, actorID, objectID int64, plantID *int64) ([]DescribePlanting, error) {
+	if _, _, err := s.objectForRole(ctx, actorID, objectID, roleViewer); err != nil {
+		return nil, err
+	}
+	plops, err := s.store.ListActivePlantingsForObject(ctx, objectID)
+	if err != nil {
+		return nil, err
+	}
+	// Plants looked up by id, not through the actor's catalog: a plop in a shared
+	// garden may be of the owner's private variety, and it still has a name.
+	plants := map[int64]domain.Plant{}
+	out := make([]DescribePlanting, 0, len(plops))
+	for _, pl := range plops {
+		if plantID != nil && pl.PlantID != *plantID {
+			continue
+		}
+		plant, ok := plants[pl.PlantID]
+		if !ok {
+			p, err := s.store.GetPlant(ctx, pl.PlantID)
+			if err != nil && !errors.Is(err, domain.ErrNotFound) {
+				return nil, err
+			}
+			if p != nil {
+				plant = *p
+			}
+			plants[pl.PlantID] = plant // a plant that no longer exists lists unnamed, not as an error
+		}
+		pl.DerivedCount = derivedCount(pl.RadiusCM, plant.SpacingCM)
+		out = append(out, describePlanting(pl, plant.Name))
+	}
+	return out, nil
+}
+
+// describeGroups groups an object's active plops by plant, in the order the
+// plants first appear, so the same garden always describes the same way.
+func describeGroups(o *domain.GardenObject, plops []domain.Planting, plantByID map[int64]domain.Plant) []DescribeGroup {
+	byPlant := map[int64][]domain.Planting{}
+	var order []int64
+	for _, pl := range plops {
+		if _, seen := byPlant[pl.PlantID]; !seen {
+			order = append(order, pl.PlantID)
+		}
+		byPlant[pl.PlantID] = append(byPlant[pl.PlantID], pl)
+	}
+	groups := make([]DescribeGroup, 0, len(order))
+	for _, pid := range order {
+		members := byPlant[pid]
+		plant := plantByID[pid]
+		g := DescribeGroup{
+			PlantID: pid, Plant: plant.Name, Plops: len(members),
+			Where: summarizeWhere(o, members), PlantedAt: dateRange(members),
+			DaysToMaturity: plant.DaysToMaturity,
+		}
+		for _, pl := range members {
+			g.Plants += effectiveCount(pl)
+		}
+		if len(members) <= maxListedPlops {
+			g.Each = make([]DescribePlanting, 0, len(members))
+			for _, pl := range members {
+				g.Each = append(g.Each, describePlanting(pl, plant.Name))
+			}
+		}
+		groups = append(groups, g)
+	}
+	return groups
+}
+
+func describePlanting(pl domain.Planting, plantName string) DescribePlanting {
+	d := DescribePlanting{
+		ID: pl.ID, Version: pl.Version, PlantID: pl.PlantID, Plant: plantName,
+		Count: effectiveCount(pl), Location: describeLocation(pl.XCM, pl.YCM), RadiusCM: pl.RadiusCM,
+	}
+	if pl.PlantedAt != nil {
+		d.PlantedAt = *pl.PlantedAt
+	}
+	return d
+}
+
+// effectiveCount is the plant count a plop stands for: its explicit count, else
+// the one derived from its area and the plant's spacing.
+func effectiveCount(pl domain.Planting) int {
+	if pl.Count != nil {
+		return *pl.Count
+	}
+	return pl.DerivedCount
+}
+
+// dateRange is the planting date shared by a group's plops, "first…last" when
+// they were planted on different days, or "" when none is dated. ISO dates
+// order as strings, so min/max need no parsing.
+func dateRange(plops []domain.Planting) string {
+	first, last := "", ""
+	for _, pl := range plops {
+		if pl.PlantedAt == nil || *pl.PlantedAt == "" {
+			continue
+		}
+		if first == "" || *pl.PlantedAt < first {
+			first = *pl.PlantedAt
+		}
+		if *pl.PlantedAt > last {
+			last = *pl.PlantedAt
+		}
+	}
+	if first == last {
+		return first
+	}
+	return first + "…" + last
+}
+
+// summarizeWhere names where a group of plops sits in its object, in the words
+// NamedRegion understands when that is exact ("north half", "NE corner"), and
+// otherwise as honestly as it can: "throughout" for a group spanning most of the
+// object, a short list of rough locations, or the bounding box of the plop
+// centres in local cm — which is what a fill needs to put something back there.
+func summarizeWhere(o *domain.GardenObject, plops []domain.Planting) string {
+	if len(plops) == 1 {
+		return describeLocation(plops[0].XCM, plops[0].YCM)
+	}
+	minX, maxX := plops[0].XCM, plops[0].XCM
+	minY, maxY := plops[0].YCM, plops[0].YCM
+	for _, pl := range plops[1:] {
+		minX, maxX = math.Min(minX, pl.XCM), math.Max(maxX, pl.XCM)
+		minY, maxY = math.Min(minY, pl.YCM), math.Max(maxY, pl.YCM)
+	}
+	const eps = 1e-6
+	// A half is "everything on one side of the centre line, and not just ON it":
+	// a column of plops down the middle is neither the west half nor the east.
+	north := maxY <= eps && minY < -eps
+	south := minY >= -eps && maxY > eps
+	west := maxX <= eps && minX < -eps
+	east := minX >= -eps && maxX > eps
+	switch {
+	case north && west:
+		return "NW corner"
+	case north && east:
+		return "NE corner"
+	case south && west:
+		return "SW corner"
+	case south && east:
+		return "SE corner"
+	case north:
+		return "north half"
+	case south:
+		return "south half"
+	case west:
+		return "west half"
+	case east:
+		return "east half"
+	}
+	// Centres spanning at least 60% of both dimensions is a whole-object fill
+	// (the outer row sits half a spacing in from each edge).
+	if hw, hh := o.WidthCM/2, o.HeightCM/2; hw > 0 && hh > 0 && maxX-minX >= 1.2*hw && maxY-minY >= 1.2*hh {
+		return "throughout"
+	}
+	var locs []string
+	seen := map[string]bool{}
+	for _, pl := range plops {
+		if l := describeLocation(pl.XCM, pl.YCM); !seen[l] {
+			seen[l] = true
+			locs = append(locs, l)
+		}
+	}
+	if len(locs) <= 3 {
+		return strings.Join(locs, ", ")
+	}
+	return fmt.Sprintf("x %.0f…%.0f, y %.0f…%.0f cm from the centre", minX, maxX, minY, maxY)
+}
+
 // describeLocation reverse-maps a local point to a rough compass location — the
 // inverse of NamedRegion's quarters/halves ("NE corner", "south", "center").
 func describeLocation(x, y float64) string {

internal/service/ops_test.go

@@ -3,6 +3,7 @@ package service
 import (
 	"context"
 	"errors"
+	"fmt"
 	"math"
 	"sort"
 	"testing"
@@ -211,10 +212,13 @@ func TestFillRegionRejectsNonFiniteRegion(t *testing.T) {
 	}
 }
 
-// TestFillRegionOutsideObjectPlantsNothing covers a region that misses the object
+// TestFillRegionOutsideObjectIsRefused covers a region that misses the object
-// entirely. clampTo inverts such a region rather than emptying it, and an
+// entirely. clampTo inverts such a region rather than emptying it; it used to
-// inverted region must plant nothing — not one plop at some point off the bed.
+// plant nothing and report success, which read as "done" to a caller that had
-func TestFillRegionOutsideObjectPlantsNothing(t *testing.T) {
+// aimed at the wrong coordinates — the agent, mixing up the garden frame and
+// the bed's local one. Now it is an error, and still never one plop at some
+// point off the bed.
+func TestFillRegionOutsideObjectIsRefused(t *testing.T) {
 	ctx := context.Background()
 	s := newTestService(t, openConfig())
 	owner := seedUser(t, s, "[email protected]")
@@ -224,12 +228,15 @@ func TestFillRegionOutsideObjectPlantsNothing(t *testing.T) {
 
 	// Wholly east of the bed: clampTo gives MinX=500, MaxX=50.
 	created, err := s.FillRegion(ctx, owner, bed.ID, rect(500, -50, 600, 50), plant.ID, nil, FillClump, nil)
-	if err != nil {
+	if !errors.Is(err, domain.ErrInvalidInput) {
-		t.Fatalf("FillRegion: %v", err)
+		t.Errorf("FillRegion outside the bed: err = %v, want ErrInvalidInput", err)
 	}
 	if len(created) != 0 {
 		t.Errorf("filled %d plops for a region outside the bed, want 0: %+v", len(created), created)
 	}
+	if full, _ := s.GardenFull(ctx, owner, g.ID, nil); len(full.Plantings) != 0 {
+		t.Errorf("the bed holds %d plops after a refused fill", len(full.Plantings))
+	}
 }
 
 // seedFillBed makes a plantable bed of the given size centered in a big garden.
@@ -471,12 +478,17 @@ func TestFillScenario(t *testing.T) {
 		t.Fatalf("objects = %d, want 1", len(desc.Objects))
 	}
 	// Tally plant → the set of rough locations it appears in.
+	// Plantings come grouped by plant: a group's Where names the region when the
+	// whole group sits in one, and a small group also lists its plops.
 	locs := map[string]map[string]bool{}
-	for _, p := range desc.Objects[0].Plantings {
+	for _, g := range desc.Objects[0].Plantings {
-		if locs[p.Plant] == nil {
+		if locs[g.Plant] == nil {
-			locs[p.Plant] = map[string]bool{}
+			locs[g.Plant] = map[string]bool{}
+		}
+		locs[g.Plant][g.Where] = true
+		for _, p := range g.Each {
+			locs[g.Plant][p.Location] = true
 		}
-		locs[p.Plant][p.Location] = true
 	}
 	if len(locs["Garlic"]) == 0 || !locs["Garlic"]["NE corner"] {
 		t.Errorf("garlic locations = %v, want NE corner", locs["Garlic"])
@@ -538,3 +550,268 @@ func TestFillRegionPlantedAt(t *testing.T) {
 		t.Errorf("bad date err = %v, want ErrInvalidInput", err)
 	}
 }
+
+// TestDescribeGardenGroupsByPlant — describe_garden is what the assistant reads
+// at the start of every turn, and the live one's first describe of a grid-filled
+// garden was ~450 plop entries. A group per plant says what a person would say
+// ("beans across the north half, sown in May"), spells out its plops only when
+// there are few, and carries the dates the model had no way to know before.
+func TestDescribeGardenGroupsByPlant(t *testing.T) {
+	ctx := context.Background()
+	s := newTestService(t, openConfig())
+	owner := seedUser(t, s, "[email protected]")
+	g, err := s.CreateGarden(ctx, owner, GardenInput{Name: "Grouped", WidthCM: 2000, HeightCM: 2000})
+	if err != nil {
+		t.Fatalf("garden: %v", err)
+	}
+	bed := seedFillBed(t, s, owner, g.ID, 400, 400)
+	beans := seedNamedPlant(t, s, owner, "Beans", 10)
+	basil := seedNamedPlant(t, s, owner, "Basil", 25)
+	may, june := "2026-05-01", "2026-06-01"
+
+	// A grid fill of the north half: far more plops than get listed, all May.
+	if _, err := s.Fill(ctx, owner, bed.ID, FillSpec{RegionName: "north", PlantID: beans.ID, Layout: FillGrid, PlantedAt: &may}); err != nil {
+		t.Fatalf("fill beans: %v", err)
+	}
+	// Three basil plops in the south half, on two dates, one with an explicit count.
+	three := 3
+	for _, in := range []PlantingInput{
+		{PlantID: basil.ID, XCM: -100, YCM: 100, RadiusCM: 20, PlantedAt: &may},
+		{PlantID: basil.ID, XCM: 0, YCM: 150, RadiusCM: 20, PlantedAt: &june, Count: &three},
+		{PlantID: basil.ID, XCM: 100, YCM: 100, RadiusCM: 20, PlantedAt: &june},
+	} {
+		if _, err := s.CreatePlanting(ctx, owner, bed.ID, in); err != nil {
+			t.Fatalf("place basil: %v", err)
+		}
+	}
+
+	desc, err := s.DescribeGarden(ctx, owner, g.ID)
+	if err != nil {
+		t.Fatalf("DescribeGarden: %v", err)
+	}
+	groups := map[string]DescribeGroup{}
+	for _, gr := range desc.Objects[0].Plantings {
+		groups[gr.Plant] = gr
+	}
+	if len(groups) != 2 {
+		t.Fatalf("groups = %d (%+v), want one per plant", len(groups), desc.Objects[0].Plantings)
+	}
+
+	b := groups["Beans"]
+	if b.Plops <= maxListedPlops {
+		t.Fatalf("the beans fill made %d plops; the test needs more than %d to exercise the listing cap", b.Plops, maxListedPlops)
+	}
+	if b.Each != nil {
+		t.Errorf("a %d-plop group listed its plops individually", b.Plops)
+	}
+	if b.Where != "north half" {
+		t.Errorf("beans where = %q, want %q", b.Where, "north half")
+	}
+	if b.PlantedAt != may {
+		t.Errorf("beans plantedAt = %q, want %q", b.PlantedAt, may)
+	}
+	if b.Plants != b.Plops {
+		t.Errorf("grid beans: plants %d ≠ plops %d (one plant per grid plop)", b.Plants, b.Plops)
+	}
+
+	ba := groups["Basil"]
+	if ba.Plops != 3 || len(ba.Each) != 3 {
+		t.Errorf("basil: plops %d, each %d; want 3 and 3 (a small group lists its plops)", ba.Plops, len(ba.Each))
+	}
+	if ba.Where != "south half" {
+		t.Errorf("basil where = %q, want %q", ba.Where, "south half")
+	}
+	if ba.PlantedAt != may+"…"+june {
+		t.Errorf("basil plantedAt = %q, want the range %q", ba.PlantedAt, may+"…"+june)
+	}
+	// Two derived counts (π·20²/25² ≈ 2 each) plus the explicit 3.
+	if want := 2*derivedCount(20, 25) + 3; ba.Plants != want {
+		t.Errorf("basil plants = %d, want %d", ba.Plants, want)
+	}
+	for _, e := range ba.Each {
+		if e.PlantedAt == "" || e.Version == 0 || e.ID == 0 {
+			t.Errorf("listed plop %+v is missing id, version or date", e)
+		}
+	}
+
+	// The big group's ids are a call away, narrowed to one plant.
+	listed, err := s.ListObjectPlantings(ctx, owner, bed.ID, &beans.ID)
+	if err != nil {
+		t.Fatalf("ListObjectPlantings: %v", err)
+	}
+	if len(listed) != b.Plops {
+		t.Errorf("listed %d beans, want %d", len(listed), b.Plops)
+	}
+	for _, p := range listed {
+		if p.PlantID != beans.ID || p.PlantedAt != may || p.Plant != "Beans" {
+			t.Errorf("listed plop %+v, want a May bean", p)
+			break
+		}
+	}
+	// A stranger gets not-found, like everything else behind the garden ACL.
+	stranger := seedUser(t, s, "[email protected]")
+	if _, err := s.ListObjectPlantings(ctx, stranger, bed.ID, nil); !errors.Is(err, domain.ErrNotFound) {
+		t.Errorf("stranger ListObjectPlantings err = %v, want ErrNotFound", err)
+	}
+}
+
+// TestSummarizeWhere pins the words a group's location comes out in: the
+// compass names NamedRegion understands when the group fits one, "throughout"
+// for a whole-bed fill, a short list for a few scattered plops, and a bounding
+// box for anything else — never a column down the middle called a "half".
+func TestSummarizeWhere(t *testing.T) {
+	o := &domain.GardenObject{WidthCM: 200, HeightCM: 100}
+	at := func(pts ...[2]float64) []domain.Planting {
+		out := make([]domain.Planting, 0, len(pts))
+		for _, p := range pts {
+			out = append(out, domain.Planting{XCM: p[0], YCM: p[1]})
+		}
+		return out
+	}
+	for _, tc := range []struct {
+		name string
+		in   []domain.Planting
+		want string
+	}{
+		{"single", at([2]float64{0, -10}), "north"},
+		{"ne corner", at([2]float64{10, -10}, [2]float64{80, -40}), "NE corner"},
+		{"south half", at([2]float64{-80, 10}, [2]float64{80, 40}), "south half"},
+		{"column down the middle", at([2]float64{0, -40}, [2]float64{0, 0}, [2]float64{0, 40}), "north, center, south"},
+		{"whole bed", at([2]float64{-90, -40}, [2]float64{90, -40}, [2]float64{-90, 40}, [2]float64{90, 40}, [2]float64{0, 0}), "throughout"},
+		{"middle third", at([2]float64{-30, -40}, [2]float64{30, -40}, [2]float64{-30, 0}, [2]float64{30, 0}, [2]float64{-30, 40}, [2]float64{30, 40}), "x -30…30, y -40…40 cm from the centre"},
+	} {
+		if got := summarizeWhere(o, tc.in); got != tc.want {
+			t.Errorf("%s: summarizeWhere = %q, want %q", tc.name, got, tc.want)
+		}
+	}
+}
+
+// TestClearPlantingsOnePlantOnTheDayTold — "take the beets out, leave the
+// garlic", dated the gardener's day: the whole-bed clear's narrower sibling, and
+// what the assistant needed instead of 116 single removals.
+func TestClearPlantingsOnePlantOnTheDayTold(t *testing.T) {
+	ctx := context.Background()
+	s := newTestService(t, openConfig())
+	owner := seedUser(t, s, "[email protected]")
+	g, err := s.CreateGarden(ctx, owner, GardenInput{Name: "Mixed", WidthCM: 2000, HeightCM: 2000})
+	if err != nil {
+		t.Fatalf("garden: %v", err)
+	}
+	bed := seedFillBed(t, s, owner, g.ID, 400, 200)
+	garlic := seedNamedPlant(t, s, owner, "Garlic", 15)
+	beet := seedNamedPlant(t, s, owner, "Beet", 10)
+	if _, err := s.Fill(ctx, owner, bed.ID, FillSpec{RegionName: "west", PlantID: garlic.ID}); err != nil {
+		t.Fatalf("fill garlic: %v", err)
+	}
+	beets, err := s.Fill(ctx, owner, bed.ID, FillSpec{RegionName: "east", PlantID: beet.ID})
+	if err != nil {
+		t.Fatalf("fill beets: %v", err)
+	}
+
+	day := "2026-08-22"
+	n, err := s.ClearPlantings(ctx, owner, bed.ID, ClearOptions{PlantID: &beet.ID, RemovedAt: &day})
+	if err != nil {
+		t.Fatalf("ClearPlantings: %v", err)
+	}
+	if n != len(beets) {
+		t.Errorf("cleared %d, want the %d beets", n, len(beets))
+	}
+	rows, err := s.store.ListPlantingsForObject(ctx, bed.ID)
+	if err != nil {
+		t.Fatalf("list: %v", err)
+	}
+	for _, r := range rows {
+		switch {
+		case r.PlantID == beet.ID && (r.RemovedAt == nil || *r.RemovedAt != day):
+			t.Errorf("beet %d removedAt = %v, want %q", r.ID, r.RemovedAt, day)
+		case r.PlantID == garlic.ID && r.RemovedAt != nil:
+			t.Errorf("garlic %d was removed by a clear aimed at the beets", r.ID)
+		}
+	}
+	sets, _, err := s.GardenHistory(ctx, owner, g.ID, 0, 0)
+	if err != nil {
+		t.Fatalf("history: %v", err)
+	}
+	if want := fmt.Sprintf("Removed Beet from %s (%d plantings)", objectLabel(bed), n); sets[0].Summary != want {
+		t.Errorf("summary = %q, want %q", sets[0].Summary, want)
+	}
+
+	// Nothing left of that plant clears nothing, cleanly; a bad date is refused
+	// before anything is touched.
+	if n, err := s.ClearPlantings(ctx, owner, bed.ID, ClearOptions{PlantID: &beet.ID}); err != nil || n != 0 {
+		t.Errorf("second clear = (%d, %v), want (0, nil)", n, err)
+	}
+	bad := "22/08/2026"
+	if _, err := s.ClearPlantings(ctx, owner, bed.ID, ClearOptions{RemovedAt: &bad}); !errors.Is(err, domain.ErrInvalidInput) {
+		t.Errorf("bad date err = %v, want ErrInvalidInput", err)
+	}
+}
+
+// TestFillByRectangleAttributesSeed — a fill can be aimed at any rectangle of the
+// object's local frame (the middle third, a strip along one edge), not only a
+// compass name, and can charge its plops to a seed lot so the lot's "remaining"
+// means something.
+func TestFillByRectangleAttributesSeed(t *testing.T) {
+	ctx := context.Background()
+	s := newTestService(t, openConfig())
+	owner := seedUser(t, s, "[email protected]")
+	g, err := s.CreateGarden(ctx, owner, GardenInput{Name: "Rect", WidthCM: 2000, HeightCM: 2000})
+	if err != nil {
+		t.Fatalf("garden: %v", err)
+	}
+	bed := seedFillBed(t, s, owner, g.ID, 240, 120)
+	beet := seedNamedPlant(t, s, owner, "Beet", 10)
+	lot, err := s.CreateSeedLot(ctx, owner, SeedLotInput{PlantID: beet.ID, Quantity: 500, Unit: "seeds"})
+	if err != nil {
+		t.Fatalf("lot: %v", err)
+	}
+
+	created, err := s.Fill(ctx, owner, bed.ID, FillSpec{
+		Region: Region{MinX: -40, MinY: -60, MaxX: 40, MaxY: 60}, PlantID: beet.ID, Layout: FillGrid, SeedLotID: &lot.ID,
+	})
+	if err != nil {
+		t.Fatalf("Fill: %v", err)
+	}
+	if len(created) == 0 {
+		t.Fatal("the rectangle fill planted nothing")
+	}
+	for _, p := range created {
+		if p.XCM < -40 || p.XCM > 40 || p.YCM < -60 || p.YCM > 60 {
+			t.Errorf("plop at (%v,%v) is outside the rectangle", p.XCM, p.YCM)
+		}
+		if p.SeedLotID == nil || *p.SeedLotID != lot.ID {
+			t.Errorf("plop %d seedLotId = %v, want the lot", p.ID, p.SeedLotID)
+		}
+	}
+	got, err := s.GetSeedLot(ctx, owner, lot.ID)
+	if err != nil {
+		t.Fatalf("GetSeedLot: %v", err)
+	}
+	if got.Used != float64(len(created)) || got.Remaining != 500-float64(len(created)) {
+		t.Errorf("lot used/remaining = %v/%v, want %d/%v", got.Used, got.Remaining, len(created), 500-float64(len(created)))
+	}
+
+	// Someone else's lot, or a lot of another plant, refuses the whole fill.
+	garlic := seedNamedPlant(t, s, owner, "Garlic", 15)
+	if _, err := s.Fill(ctx, owner, bed.ID, FillSpec{RegionName: "all", PlantID: garlic.ID, SeedLotID: &lot.ID}); err == nil {
+		t.Error("a fill charged to a lot of a different plant succeeded")
+	}
+	// No name and no rectangle is "nowhere", not "one plop in the middle" (which
+	// is what hexCenters makes of a zero-area region).
+	for _, r := range []Region{{}, {MinX: 10, MinY: -10, MaxX: 10, MaxY: 10}, {MinX: 20, MinY: 0, MaxX: -20, MaxY: 10}} {
+		if _, err := s.Fill(ctx, owner, bed.ID, FillSpec{Region: r, PlantID: garlic.ID}); !errors.Is(err, domain.ErrInvalidInput) {
+			t.Errorf("empty rectangle %+v: err = %v, want ErrInvalidInput", r, err)
+		}
+	}
+	// A rectangle that misses the bed (it is 240 wide, so ±120) — or only
+	// touches its edge — is an error, not a successful fill of nothing.
+	for _, r := range []Region{{MinX: 200, MinY: -10, MaxX: 300, MaxY: 10}, {MinX: 120, MinY: -10, MaxX: 200, MaxY: 10}} {
+		if _, err := s.Fill(ctx, owner, bed.ID, FillSpec{Region: r, PlantID: garlic.ID}); !errors.Is(err, domain.ErrInvalidInput) {
+			t.Errorf("off-bed rectangle %+v: err = %v, want ErrInvalidInput", r, err)
+		}
+	}
+	// Partly outside is fine: the part inside gets planted.
+	if created, err := s.Fill(ctx, owner, bed.ID, FillSpec{Region: Region{MinX: 80, MinY: -10, MaxX: 300, MaxY: 10}, PlantID: garlic.ID}); err != nil || len(created) == 0 {
+		t.Errorf("overhanging rectangle: %d plops, %v; want some", len(created), err)
+	}
+}

internal/service/plantings.go

@@ -3,6 +3,7 @@ package service
 import (
 	"context"
 	"errors"
+	"fmt"
 	"math"
 	"strings"
 	"time"
@@ -89,12 +90,18 @@ func (s *Service) CreatePlanting(ctx context.Context, actorID, objectID int64, i
 		return nil, err
 	}
 
+	radius := in.RadiusCM
+	if radius == 0 {
+		// Unspecified means ONE plant: the editor's tap-to-place radius, half the
+		// spacing. A clump (1.5× spacing) is what a fill makes, not a placement.
+		radius = plant.SpacingCM / 2
+	}
 	p := &domain.Planting{
 		ObjectID:  objectID,
 		PlantID:   in.PlantID,
 		XCM:       in.XCM,
 		YCM:       in.YCM,
-		RadiusCM:  in.RadiusCM,
+		RadiusCM:  radius,
 		Count:     in.Count,
 		Label:     trimStringPtr(in.Label),
 		PlantedAt: in.PlantedAt,
@@ -179,14 +186,83 @@ func (s *Service) UpdatePlanting(ctx context.Context, actorID, plantingID int64,
 }
 
 // RemovePlanting soft-removes a single plop — the one-plop counterpart to
-// ClearObject, used by the agent's remove_planting tool. It stamps removed_at
+// ClearObject, used by the agent's remove_planting tool. removedAt (YYYY-MM-DD)
-// from the service clock (s.now()), same as ClearObject and the fill path, so the
+// is the day the caller knows it happened — the gardener's local day; nil
-// removal date can't diverge by which caller set it; then delegates to
+// stamps the service clock's UTC today, the same default ClearObject and the
-// UpdatePlanting for the editor-role check, version guard and history record.
+// fill path use. Delegates to UpdatePlanting for the editor-role check, version
-func (s *Service) RemovePlanting(ctx context.Context, actorID, plantingID, version int64) (*domain.Planting, error) {
+// guard and history record.
-	today := s.now().UTC().Format(dateLayout)
+func (s *Service) RemovePlanting(ctx context.Context, actorID, plantingID, version int64, removedAt *string) (*domain.Planting, error) {
+	if !validDatePtr(removedAt) {
+		return nil, fmt.Errorf("%w: removedAt must be a YYYY-MM-DD date", domain.ErrInvalidInput)
+	}
+	on := s.now().UTC().Format(dateLayout)
+	if removedAt != nil {
+		on = *removedAt
+	}
 	return s.UpdatePlanting(ctx, actorID, plantingID,
-		PlantingPatch{SetRemovedAt: true, RemovedAt: &today}, version)
+		PlantingPatch{SetRemovedAt: true, RemovedAt: &on}, version)
+}
+
+// MoveInput says where a plop goes: a position in the local frame of ToObjectID,
+// or of the plop's current object when ToObjectID is nil.
+type MoveInput struct {
+	ToObjectID *int64
+	XCM, YCM   float64
+}
+
+// MovePlanting relocates one plop — within its object, or into another plantable
+// object of the same garden — keeping its plant, size, count and planting date.
+// Removing and re-placing is not the same thing: "move the tomatoes to the other
+// bed" is not "pull them up and plant new ones today", and the live assistant
+// did exactly that for want of this. Version-guarded like UpdatePlanting; a
+// within-object move IS an UpdatePlanting of the position.
+func (s *Service) MovePlanting(ctx context.Context, actorID, plantingID int64, in MoveInput, version int64) (*domain.Planting, error) {
+	pl, err := s.store.GetPlanting(ctx, plantingID)
+	if err != nil {
+		return nil, err // ErrNotFound
+	}
+	if in.ToObjectID == nil || *in.ToObjectID == pl.ObjectID {
+		return s.UpdatePlanting(ctx, actorID, plantingID, PlantingPatch{XCM: &in.XCM, YCM: &in.YCM}, version)
+	}
+	from, g, err := s.objectForRole(ctx, actorID, pl.ObjectID, roleEditor)
+	if err != nil {
+		return nil, err
+	}
+	to, toGarden, err := s.objectForRole(ctx, actorID, *in.ToObjectID, roleEditor)
+	if err != nil {
+		return nil, err
+	}
+	if toGarden.ID != g.ID {
+		return nil, fmt.Errorf("%w: a planting can only move within its own garden", domain.ErrInvalidInput)
+	}
+	if !to.Plantable {
+		return nil, fmt.Errorf("%w: %s can't hold plants", domain.ErrInvalidInput, objectLabel(to))
+	}
+	// By id, not through the actor's catalog: the plop may be of a variety the
+	// actor can't see (a shared editor, the owner's private plant), and moving it
+	// isn't choosing it.
+	plant, err := s.store.GetPlant(ctx, pl.PlantID)
+	if err != nil {
+		return nil, err
+	}
+	before := *pl
+	pl.ObjectID = to.ID
+	pl.XCM, pl.YCM = in.XCM, in.YCM
+	if err := finalizePlanting(pl, to, true); err != nil {
+		return nil, err
+	}
+	pl.Version = version
+	updated, err := s.store.UpdatePlanting(ctx, pl)
+	if err != nil {
+		if errors.Is(err, domain.ErrVersionConflict) && updated != nil {
+			s.enrichDerived(ctx, updated)
+		}
+		return updated, err
+	}
+	s.record(ctx, g.ID, actorID, "Moved "+plant.Name+" from "+objectLabel(from)+" to "+objectLabel(to),
+		changeUpdate(domain.EntityPlanting, updated.ID, &before, updated))
+	updated.DerivedCount = derivedCount(updated.RadiusCM, plant.SpacingCM)
+	return updated, nil
 }
 
 // plantingEditSummary describes a plop edit for the history list. Soft-removal

internal/service/plantings_test.go

@@ -207,11 +207,22 @@ func TestPlantingBoundsCheck(t *testing.T) {
 	}); err != nil {
 		t.Errorf("edge-of-bounds center should be allowed: %v", err)
 	}
-	// Non-positive radius rejected.
+	// A negative radius is rejected; an unspecified (zero) one means ONE plant —
+	// half the plant's spacing, the editor's tap-to-place size — so a caller that
+	// just says "put a tomato here" gets a tomato-sized plop, not an error.
 	if _, err := s.CreatePlanting(context.Background(), owner, bed.ID, PlantingInput{
-		PlantID: plant.ID, XCM: 0, YCM: 0, RadiusCM: 0,
+		PlantID: plant.ID, XCM: 0, YCM: 0, RadiusCM: -1,
 	}); !errors.Is(err, domain.ErrInvalidInput) {
-		t.Errorf("zero radius err = %v, want ErrInvalidInput", err)
+		t.Errorf("negative radius err = %v, want ErrInvalidInput", err)
+	}
+	one, err := s.CreatePlanting(context.Background(), owner, bed.ID, PlantingInput{
+		PlantID: plant.ID, XCM: 0, YCM: 0, RadiusCM: 0,
+	})
+	if err != nil {
+		t.Fatalf("zero radius: %v, want the one-plant default", err)
+	}
+	if one.RadiusCM != plant.SpacingCM/2 || one.DerivedCount != 1 {
+		t.Errorf("zero radius → radius %v (count %d), want spacing/2 = %v (count 1)", one.RadiusCM, one.DerivedCount, plant.SpacingCM/2)
 	}
 }
 
@@ -376,3 +387,96 @@ func TestDeletePlanting(t *testing.T) {
 		t.Errorf("planting still present after delete: %d", len(full.Plantings))
 	}
 }
+
+// TestMovePlantingAcrossBedsKeepsTheDate — "move the tomatoes to the other bed"
+// is not "pull them up and plant new ones today". The assistant had only the
+// latter for want of this, and the plants lost their planting date on the way.
+func TestMovePlantingAcrossBedsKeepsTheDate(t *testing.T) {
+	ctx := context.Background()
+	s := newTestService(t, openConfig())
+	owner := seedUser(t, s, "[email protected]")
+	g := seedGarden(t, s, owner)
+	from, err := s.CreateObject(ctx, owner, g.ID, ObjectInput{Kind: domain.KindBed, Name: "A", XCM: 500, YCM: 500, WidthCM: 200, HeightCM: 200})
+	if err != nil {
+		t.Fatalf("bed A: %v", err)
+	}
+	to, err := s.CreateObject(ctx, owner, g.ID, ObjectInput{Kind: domain.KindBed, Name: "B", XCM: 900, YCM: 500, WidthCM: 200, HeightCM: 200})
+	if err != nil {
+		t.Fatalf("bed B: %v", err)
+	}
+	path, err := s.CreateObject(ctx, owner, g.ID, ObjectInput{Kind: domain.KindPath, Name: "Path", XCM: 700, YCM: 900, WidthCM: 400, HeightCM: 100})
+	if err != nil {
+		t.Fatalf("path: %v", err)
+	}
+	if path.Plantable {
+		no := false
+		if path, err = s.UpdateObject(ctx, owner, path.ID, ObjectPatch{Plantable: &no}, path.Version); err != nil {
+			t.Fatalf("make the path unplantable: %v", err)
+		}
+	}
+	plant := seedOwnPlant(t, s, owner, 30)
+	may := "2026-05-20"
+	pl, err := s.CreatePlanting(ctx, owner, from.ID, PlantingInput{PlantID: plant.ID, XCM: 10, YCM: 10, RadiusCM: 15, PlantedAt: &may})
+	if err != nil {
+		t.Fatalf("plant: %v", err)
+	}
+
+	moved, err := s.MovePlanting(ctx, owner, pl.ID, MoveInput{ToObjectID: &to.ID, XCM: -50, YCM: 20}, pl.Version)
+	if err != nil {
+		t.Fatalf("MovePlanting: %v", err)
+	}
+	if moved.ObjectID != to.ID || moved.XCM != -50 || moved.YCM != 20 {
+		t.Errorf("moved to object %d at (%v,%v), want B (%d) at (-50,20)", moved.ObjectID, moved.XCM, moved.YCM, to.ID)
+	}
+	if moved.PlantedAt == nil || *moved.PlantedAt != may {
+		t.Errorf("plantedAt after the move = %v, want %q kept", moved.PlantedAt, may)
+	}
+	if moved.Version != pl.Version+1 || moved.DerivedCount == 0 {
+		t.Errorf("moved row version %d (count %d), want %d and a derived count", moved.Version, moved.DerivedCount, pl.Version+1)
+	}
+
+	// It reads as a move in history, and undo puts it back in A.
+	sets, _, err := s.GardenHistory(ctx, owner, g.ID, 0, 0)
+	if err != nil {
+		t.Fatalf("history: %v", err)
+	}
+	if want := "Moved " + plant.Name + " from A to B"; sets[0].Summary != want {
+		t.Errorf("summary = %q, want %q", sets[0].Summary, want)
+	}
+	if _, conflicts, err := s.RevertChangeSet(ctx, owner, sets[0].ID, domain.SourceUI); err != nil || len(conflicts) != 0 {
+		t.Fatalf("undo: err=%v conflicts=%+v", err, conflicts)
+	}
+	back, err := s.store.GetPlanting(ctx, pl.ID)
+	if err != nil {
+		t.Fatalf("get: %v", err)
+	}
+	if back.ObjectID != from.ID || back.XCM != 10 {
+		t.Errorf("after undo the plop is in object %d at x=%v, want A (%d) at 10", back.ObjectID, back.XCM, from.ID)
+	}
+
+	// Refused: a position outside the target, a target that can't hold plants, a
+	// bed in another garden — and a stale version conflicts like any edit.
+	cur := back
+	if _, err := s.MovePlanting(ctx, owner, pl.ID, MoveInput{ToObjectID: &to.ID, XCM: 500, YCM: 0}, cur.Version); !errors.Is(err, domain.ErrInvalidInput) {
+		t.Errorf("out-of-bounds move err = %v, want ErrInvalidInput", err)
+	}
+	if _, err := s.MovePlanting(ctx, owner, pl.ID, MoveInput{ToObjectID: &path.ID, XCM: 0, YCM: 0}, cur.Version); !errors.Is(err, domain.ErrInvalidInput) {
+		t.Errorf("move into a path err = %v, want ErrInvalidInput", err)
+	}
+	other := seedGarden(t, s, owner)
+	far, err := s.CreateObject(ctx, owner, other.ID, ObjectInput{Kind: domain.KindBed, Name: "Far", XCM: 500, YCM: 500, WidthCM: 200, HeightCM: 200})
+	if err != nil {
+		t.Fatalf("far bed: %v", err)
+	}
+	if _, err := s.MovePlanting(ctx, owner, pl.ID, MoveInput{ToObjectID: &far.ID, XCM: 0, YCM: 0}, cur.Version); !errors.Is(err, domain.ErrInvalidInput) {
+		t.Errorf("move into another garden err = %v, want ErrInvalidInput", err)
+	}
+	if _, err := s.MovePlanting(ctx, owner, pl.ID, MoveInput{XCM: 5, YCM: 5}, cur.Version-1); !errors.Is(err, domain.ErrVersionConflict) {
+		t.Errorf("stale version err = %v, want ErrVersionConflict", err)
+	}
+	// A within-bed move is just a position change.
+	within, err := s.MovePlanting(ctx, owner, pl.ID, MoveInput{XCM: 5, YCM: 5}, cur.Version)
+	if err != nil || within.ObjectID != from.ID || within.XCM != 5 {
+		t.Errorf("within-bed move = %+v, %v; want the same bed at x=5", within, err)
+	}
+}

internal/service/revisions.go

@@ -200,7 +200,21 @@ func (s *Service) record(ctx context.Context, gardenID, actorID int64, summary s
 		return
 	}
 	if sc := scopeFrom(ctx); sc != nil {
-		sc.append(revs)
+		if sc.gardenID == gardenID {
+			sc.append(revs)
+			return
+		}
+		// The scope is for ANOTHER garden — an agent turn on garden A that the
+		// model pointed at an object in garden B. Joining the scope would file B's
+		// revisions under A's history, where B's undo can't see them and A's undo
+		// would revert rows in a garden the person isn't looking at. Record them
+		// where they belong, as their own change set, keeping the source and run
+		// id so the entry still reads as the agent's work.
+		own := &changeScope{gardenID: gardenID, actorID: actorID, source: sc.source, summary: summary, agentRunID: sc.agentRunID}
+		own.append(revs)
+		if _, err := s.commitScope(ctx, own, nil); err != nil {
+			slog.Error("service: record change set outside the open scope", "error", err, "garden", gardenID, "summary", summary)
+		}
 		return
 	}
 	// Auto-scope: one operation, its own change set. Written through the same

internal/service/revisions_test.go

@@ -893,3 +893,50 @@ func TestAutoScopedMutationRecordsEvenIfTheCallerWentAway(t *testing.T) {
 		t.Errorf("undo left x at %v, want %v", back.XCM, bed.XCM)
 	}
 }
+
+// TestRecordOutsideTheOpenScopeFilesUnderItsOwnGarden — a scope is for ONE
+// garden, but nothing stops a mutation inside it from touching another garden
+// the actor can edit (the agent, pointed at "my other garden"). Those revisions
+// belong to the garden they changed, as their own change set carrying the
+// scope's source and run id — not to the open scope, whose undo would then
+// quietly revert rows in a garden nobody is looking at.
+func TestRecordOutsideTheOpenScopeFilesUnderItsOwnGarden(t *testing.T) {
+	ctx := context.Background()
+	s := newTestService(t, openConfig())
+	owner := seedUser(t, s, "[email protected]")
+	a := seedGarden(t, s, owner)
+	b := seedGarden(t, s, owner)
+	bedB, err := s.CreateObject(ctx, owner, b.ID, ObjectInput{Kind: domain.KindBed, Name: "Bed", XCM: 500, YCM: 500, WidthCM: 200, HeightCM: 200})
+	if err != nil {
+		t.Fatalf("bed: %v", err)
+	}
+	beforeB, _, _ := s.GardenHistory(ctx, owner, b.ID, 0, 0)
+
+	run := "run-1"
+	cs, err := s.WithChangeSet(ctx, owner, a.ID, ChangeSetOptions{Source: domain.SourceAgent, Summary: "a turn on A", AgentRunID: &run},
+		func(ctx context.Context) error {
+			name := "Renamed from A"
+			_, err := s.UpdateObject(ctx, owner, bedB.ID, ObjectPatch{Name: &name}, bedB.Version)
+			return err
+		})
+	if err != nil {
+		t.Fatalf("WithChangeSet: %v", err)
+	}
+	if cs != nil {
+		t.Errorf("the scope on A wrote change set %d, but nothing in A changed", cs.ID)
+	}
+	afterB, _, _ := s.GardenHistory(ctx, owner, b.ID, 0, 0)
+	if len(afterB) != len(beforeB)+1 {
+		t.Fatalf("B's history grew by %d, want 1", len(afterB)-len(beforeB))
+	}
+	got := afterB[0]
+	if got.Source != domain.SourceAgent || got.AgentRunID == nil || *got.AgentRunID != run {
+		t.Errorf("B's entry = source %q run %v, want the scope's (agent, %q)", got.Source, got.AgentRunID, run)
+	}
+	if _, conflicts, err := s.RevertChangeSet(ctx, owner, got.ID, domain.SourceUI); err != nil || len(conflicts) != 0 {
+		t.Fatalf("undo from B: err=%v conflicts=%+v", err, conflicts)
+	}
+	if d, err := s.DescribeGarden(ctx, owner, b.ID); err != nil || len(d.Objects) != 1 || d.Objects[0].Name != "Bed" {
+		t.Errorf("after undo B is %+v (%v), want the bed's name back", d, err)
+	}
+}

internal/store/plantings.go

@@ -268,13 +268,13 @@ func (d *DB) CreatePlantings(ctx context.Context, plantings []*domain.Planting)
 func (d *DB) UpdatePlanting(ctx context.Context, p *domain.Planting) (*domain.Planting, error) {
 	updated, err := scanPlanting(d.sql.QueryRowContext(ctx,
 		`UPDATE plantings
-		    SET plant_id = ?, x_cm = ?, y_cm = ?, radius_cm = ?, count = ?, label = ?,
+		    SET object_id = ?, plant_id = ?, x_cm = ?, y_cm = ?, radius_cm = ?, count = ?, label = ?,
 		        planted_at = ?, removed_at = ?, seed_lot_id = ?,
 		        version = version + 1,
 		        updated_at = strftime('%Y-%m-%dT%H:%M:%SZ', 'now')
 		  WHERE id = ? AND version = ?
 		  RETURNING `+plantingColumns,
-		p.PlantID, p.XCM, p.YCM, p.RadiusCM, p.Count, p.Label, p.PlantedAt, p.RemovedAt, p.SeedLotID,
+		p.ObjectID, p.PlantID, p.XCM, p.YCM, p.RadiusCM, p.Count, p.Label, p.PlantedAt, p.RemovedAt, p.SeedLotID,
 		p.ID, p.Version,
 	))
 	if errors.Is(err, sql.ErrNoRows) {

web/src/editor/AssistantTab.tsx

@@ -88,6 +88,10 @@ export function AssistantTab({ gardenId, canEdit, undo, large = false }: { garde
 
   return (
     <div className="flex min-h-0 flex-1 flex-col gap-2.5">
+      {/* The thread scrolls on its own so the composer stays put: with the whole
+          tab scrolling, a long conversation pushed the input off the bottom and
+          every new message scrolled it further away. */}
+      <div className="flex min-h-0 flex-1 flex-col gap-2.5 overflow-y-auto">
       {!canEdit && <Alert tone="info">You can only view this garden, so the assistant can't change anything in it.</Alert>}
       {history.isPending && <p className="text-[13px] text-ink-mute">Loading the conversation…</p>}
       {history.isError && <Alert>{errorMessage(history.error, "Couldn't load the conversation.")}</Alert>}
@@ -103,8 +107,10 @@ export function AssistantTab({ gardenId, canEdit, undo, large = false }: { garde
             {m.body}
           </div>
         ) : (
-          <div key={m.id} className="flex max-w-[90%] flex-col items-start gap-1 self-start">
+          <div key={m.id} className="flex min-w-0 max-w-[90%] flex-col items-start gap-1 self-start">
-            <div className={cn('rounded-[18px_18px_18px_4px] border border-divider bg-bg px-[13px] py-[9px] leading-[1.45]', bubbleText)}>
+            {/* min-w-0 / max-w-full: a wide markdown table scrolls inside its own
+                wrapper instead of widening the bubble past the panel. */}
+            <div className={cn('min-w-0 max-w-full rounded-[18px_18px_18px_4px] border border-divider bg-bg px-[13px] py-[9px] leading-[1.45]', bubbleText)}>
               <MarkdownBoundary fallback={<span className="whitespace-pre-wrap">{m.body}</span>}>
                 <Suspense fallback={<span className="whitespace-pre-wrap">{m.body}</span>}>
                   <MarkdownMessage>{m.body}</MarkdownMessage>
@@ -136,7 +142,8 @@ export function AssistantTab({ gardenId, canEdit, undo, large = false }: { garde
       {warning && <Alert tone="info">{warning}</Alert>}
       {error && <Alert>{error}</Alert>}
       <div ref={bottom} />
-      <div className="mt-auto flex flex-col gap-1.5 pt-1.5">
+      </div>
+      <div className="flex flex-col gap-1.5 pt-1.5">
         {messages.length > 0 && !pending && (
           <button
             type="button"

web/src/lib/agent.ts

@@ -8,6 +8,7 @@
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
 import { z } from 'zod'
 import { API_BASE, api } from './api'
+import { today } from './dates'
 import { gardenFullKey } from './objects'
 import { historyKey } from './history'
 
@@ -97,14 +98,26 @@ export interface AgentStep {
 const TOOL_LABELS: Record<string, string> = {
   list_gardens: 'Looking at your gardens',
   describe_garden: 'Reading the garden',
+  list_plantings: 'Reading a bed',
   create_object: 'Adding a bed',
   move_object: 'Moving a bed',
+  update_object: 'Changing a bed',
+  delete_object: 'Removing a bed',
   place_planting: 'Planting',
   fill_region: 'Filling a bed',
+  move_planting: 'Moving a plant',
+  remove_planting: 'Pulling a plant',
+  remove_plantings: 'Pulling plants',
   clear_object: 'Clearing a bed',
   find_plant: 'Looking up a plant',
   create_plant: 'Adding a plant to your catalog',
+  update_plant: 'Updating your catalog',
   add_journal_entry: 'Writing a journal note',
+  read_journal: 'Reading the journal',
+  read_history: 'Reading the history',
+  list_seed_lots: 'Checking your seed',
+  record_seed_lot: 'Recording seed',
+  copy_garden: 'Copying the garden',
 }
 
 export function describeStep(step: AgentStep): string {
@@ -154,10 +167,14 @@ export async function streamChat(
 ): Promise<void> {
   let res: Response
   try {
+    // `today` is the browser's local day, for the same reason every other
+    // dated write sends it: the assistant dates what it plants, removes and
+    // journals with it, and tells the model what day it is. Left to the server
+    // the date is UTC's; left to the model it was a year from its training data.
     res = await fetch(`${API_BASE}/agent/chat`, {
       method: 'POST',
       headers: { 'content-type': 'application/json' },
-      body: JSON.stringify({ gardenId, message }),
+      body: JSON.stringify({ gardenId, message, today: today() }),
       credentials: 'same-origin',
       signal,
     })