Agent: add the corrective tools the toolbox was missing (#85 item 3)

The toolbox could create and move but not delete or resize; write the
journal but not read it; clear a whole bed but not pull one plant; report
seed remaining but not record a purchase. Close those gaps with thin
adapters over the SAME service methods the REST API uses, so they inherit
the permission checks unchanged:

  read_journal    → ListJournal   (the write/read asymmetry, most visible)
  update_object   → UpdateObject  (resize / rotate / rename / plantable)
  delete_object   → DeleteObject  (counterpart to create_object)
  remove_planting → UpdatePlanting (soft-remove ONE plop, like clear does)
  list_seed_lots  → ListSeedLots
  record_seed_lot → CreateSeedLot (record a purchase; "I bought 2 packets")

To address a single plop the agent needs its id + version, so
DescribePlanting now carries both — the same way DescribeObject.Version
already lets it edit an object. remove_planting soft-removes (removed_at =
today), mirroring clear_object, so the plant stays in planting history and
the change is undoable.

Deferred deliberately: an undo/revert tool needs a way to list recent
change sets to get a changeSetId, which is a larger addition; noted on the
issue for a follow-up.

Tested through the tool layer (TestCorrectiveTools): resize, single-plop
removal, journal read-back, seed-lot record+list, and delete.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ

internal/agent/tools.go

@@ -2,6 +2,7 @@ package agent
 
 import (
 	"context"
+	"time"
 
 	"gitea.stevedudenhoeffer.com/steve/majordomo/llm"
 
@@ -64,6 +65,40 @@ func NewToolbox(svc *service.Service, actorID int64) *llm.Toolbox {
 				"(\"powdery mildew on the west bed\", \"first frost\"), not for descriptions of what a "+
 				"thing is. 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. "+
+				"Narrow it with objectId (one bed), or a from/to date range (YYYY-MM-DD). Most "+
+				"recently observed first. Use this to answer \"what did I note about the west bed?\" "+
+				"or \"what happened last spring?\".",
+			a.readJournal),
+		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 "+
+				"you pass change. Needs the object's current version from describe_garden. Example: "+
+				"\"make that bed 60cm wider\" — read its widthCm from describe_garden, add 60, pass the "+
+				"sum.",
+			a.updateObject),
+		llm.DefineTool("delete_object",
+			"Delete an object from a garden entirely, along with its plantings. This is the "+
+				"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 "+
+				"remaining\" number find_plant reports.",
+			a.listSeedLots),
+		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\".",
+			a.recordSeedLot),
 	)
 }
 
@@ -177,3 +212,80 @@ func (a *adapter) clearObject(ctx context.Context, args struct {
 	}
 	return map[string]int{"cleared": 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"`
+	From     string `json:"from" description:"optional earliest observed date, YYYY-MM-DD"`
+	To       string `json:"to" description:"optional latest observed date, YYYY-MM-DD"`
+}) (any, error) {
+	q := service.JournalQuery{ObjectID: args.ObjectID, Limit: 50}
+	if args.From != "" {
+		q.From = &args.From
+	}
+	if args.To != "" {
+		q.To = &args.To
+	}
+	entries, hasMore, err := a.svc.ListJournal(ctx, a.actor, args.GardenID, q)
+	if err != nil {
+		return nil, err
+	}
+	return map[string]any{"entries": entries, "hasMore": hasMore}, nil
+}
+
+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)"`
+	Name        *string  `json:"name" description:"optional new label"`
+	WidthCM     *float64 `json:"widthCm" description:"optional new width in cm (a circle's diameter)"`
+	HeightCM    *float64 `json:"heightCm" description:"optional new height in cm"`
+	RotationDeg *float64 `json:"rotationDeg" description:"optional new rotation in degrees"`
+	Plantable   *bool    `json:"plantable" description:"optional: whether the object can hold plants"`
+}) (any, error) {
+	return a.svc.UpdateObject(ctx, a.actor, args.ObjectID, service.ObjectPatch{
+		Name: args.Name, WidthCM: args.WidthCM, HeightCM: args.HeightCM,
+		RotationDeg: args.RotationDeg, Plantable: args.Plantable,
+	}, args.Version)
+}
+
+func (a *adapter) deleteObject(ctx context.Context, args struct {
+	ObjectID int64 `json:"objectId" description:"object to delete (with its plantings)"`
+}) (any, error) {
+	if err := a.svc.DeleteObject(ctx, a.actor, args.ObjectID); err != nil {
+		return nil, err
+	}
+	return map[string]any{"deleted": args.ObjectID}, nil
+}
+
+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: set removed_at to today, mirroring clear_object, so the plop
+	// stays in the planting history and the change is undoable.
+	today := time.Now().UTC().Format("2006-01-02")
+	return a.svc.UpdatePlanting(ctx, a.actor, args.PlantingID,
+		service.PlantingPatch{SetRemovedAt: true, RemovedAt: &today}, args.Version)
+}
+
+func (a *adapter) listSeedLots(ctx context.Context, args struct {
+	PlantID *int64 `json:"plantId" description:"optional: only lots for this plant"`
+}) (any, error) {
+	return a.svc.ListSeedLots(ctx, a.actor, args.PlantID)
+}
+
+func (a *adapter) recordSeedLot(ctx context.Context, args struct {
+	PlantID       int64   `json:"plantId" description:"plant the seed is for (from find_plant); must be the user's own or a built-in"`
+	Quantity      float64 `json:"quantity" description:"how much was bought, in the given unit"`
+	Unit          string  `json:"unit" description:"what quantity counts, e.g. packets | seeds | grams"`
+	Vendor        string  `json:"vendor" description:"optional vendor name"`
+	SourceURL     string  `json:"sourceUrl" description:"optional http(s) link to where it was bought"`
+	PackedForYear *int    `json:"packedForYear" description:"optional 'packed for' year from the packet"`
+	Notes         string  `json:"notes" description:"optional free-text notes"`
+}) (any, error) {
+	return a.svc.CreateSeedLot(ctx, a.actor, service.SeedLotInput{
+		PlantID: args.PlantID, Quantity: args.Quantity, Unit: args.Unit,
+		Vendor: args.Vendor, SourceURL: args.SourceURL,
+		PackedForYear: args.PackedForYear, Notes: args.Notes,
+	})
+}