internal/agent/runtime.go

@@ -169,7 +169,7 @@ func (r *Runner) Run(ctx context.Context, actorID, gardenID int64, message, toda
 	if result != nil {
 		turn.Reply = result.Output
 		turn.Steps = len(result.Steps)
-		if corrected := honestReply(turn.Reply, result); corrected != turn.Reply {
+		if corrected := honestReply(turn.Reply, result, tools); corrected != turn.Reply {
 			// The steps are logged so the mechanism can be read off the log
 			// next time — which tool it tried, what came back, what it said.
 			slog.Warn("agent: reply claimed a change no tool made", "run", runID, "garden", gardenID, "steps", describeSteps(result))
@@ -190,12 +190,23 @@ var readOnlyTools = map[string]bool{
 	"list_shares": true,
 }
 
-// changeClaim matches a reply that reports a change as made: a "Done"/"Fixed"
-// opener, or a first-person past-tense claim ("I've deleted", "I moved"). A
-// question or an offer ("want me to delete it?", "I'll remove it") does not
-// match — only a claim of something already done.
-var changeClaim = regexp.MustCompile(`(?i)(?:^\s*(?:done|fixed|undone|deleted|removed|updated|changed|added|saved|moved|planted|filled|cleared|corrected|recorded|marked|shared|renamed|reverted)\b` +
-	`|\bI(?:'ve| have)? (?:just |now |also |already )?(?:deleted|removed|updated|changed|added|saved|moved|planted|filled|cleared|corrected|recorded|marked|shared|renamed|reverted|undone|set|put|pulled|replaced|swapped|rotated|rewrote|rewritten|edited|created|started|attached|restored|made)\b)`)
+// selfReportingTools succeed without necessarily changing anything —
+// public_link with action=get reads, and undo_change with nothing left to
+// revert reverts nothing — so their results don't count; the adapter says
+// whether they changed something (adapter.changed).
+var selfReportingTools = map[string]bool{"public_link": true, "undo_change": true}
+
+// changeVerbs are the past participles a claim of change is made of. One
+// list, used by both shapes the claim takes.
+const changeVerbs = `deleted|removed|updated|changed|added|saved|moved|planted|filled|cleared|corrected|recorded|marked|shared|renamed|reverted|undone|set|put|pulled|replaced|swapped|rotated|rewrote|rewritten|edited|created|started|attached|restored|made`
+
+// changeClaim matches a reply that reports a change as made: a "Done"/"Fixed"/
+// "Undone" opener, or a first-person past-tense claim ("I've deleted", "I
+// moved"). A question or an offer ("want me to delete it?", "I'll remove it")
+// does not match — only a claim of something already done. The opener list is
+// short on purpose: "Updated totals:" opening a read-only answer must not
+// trip it, and those replies say "I've …" when they mean a change.
+var changeClaim = regexp.MustCompile(`(?i)(?:^\s*(?:done|fixed|undone)\b|\bI(?:'ve| have)? (?:just |now |also |already )?(?:` + changeVerbs + `)\b)`)
 
 // unbackedClaim is what the person reads under a claim no tool backs up.
 const unbackedClaim = "\n\n_Correction: nothing actually changed in this turn — no tool call that changes anything succeeded. Ask again and I'll do it properly._"
@@ -215,8 +226,10 @@ func describeSteps(r *agent.Result) string {
 		}
 		if st.Response != nil {
 			if text := strings.Join(strings.Fields(st.Response.Text()), " "); text != "" {
-				if len(text) > 80 {
-					text = text[:80] + "…"
+				// Cut on a rune boundary, like turnSummary: a byte slice can
+				// split a multibyte character and log invalid UTF-8.
+				if runes := []rune(text); len(runes) > 80 {
+					text = string(runes[:80]) + "…"
 				}
 				fmt.Fprintf(&b, " %q", text)
 			}
@@ -226,17 +239,18 @@ func describeSteps(r *agent.Result) string {
 	return strings.Join(parts, " | ")
 }
 
-// acted reports whether any tool call in the run succeeded at something that
-// is not read-only.
-func acted(r *agent.Result) bool {
+// acted reports whether the run changed anything: a successful call to a tool
+// that is neither read-only nor self-reporting, or a self-reporting tool that
+// told the adapter it changed something.
+func acted(r *agent.Result, tools *adapter) bool {
 	for _, st := range r.Steps {
 		for _, res := range st.Results {
-			if !res.IsError && !readOnlyTools[res.Name] {
+			if !res.IsError && !readOnlyTools[res.Name] && !selfReportingTools[res.Name] {
 				return true
 			}
 		}
 	}
-	return false
+	return tools != nil && tools.didChange()
 }
 
 // honestReply appends a correction to a reply that claims a change when no
@@ -247,8 +261,8 @@ func acted(r *agent.Result) bool {
 // discover it. A reply that claims nothing, or a run in which some change
 // succeeded, passes through unchanged — this cannot tell a true claim from a
 // false one once anything at all was done, so it only speaks when nothing was.
-func honestReply(reply string, r *agent.Result) string {
-	if r == nil || acted(r) || !changeClaim.MatchString(reply) {
+func honestReply(reply string, r *agent.Result, tools *adapter) string {
+	if r == nil || acted(r, tools) || !changeClaim.MatchString(reply) {
 		return reply
 	}
 	return reply + unbackedClaim

internal/agent/runtime_test.go

@@ -642,11 +642,29 @@ func TestAClaimedChangeNoToolMadeIsCorrected(t *testing.T) {
 	if r := run(fake.Reply("That note is still there — want me to delete it?")); corrected(r) {
 		t.Errorf("an offer was corrected as if it were a claim: %q", r)
 	}
+	// Reading the public link is not a change, whatever its tool name.
+	if r := run(toolCall("public_link", map[string]any{"gardenId": g.ID, "action": "get"}), fake.Reply("Done — I've turned the public link on.")); !corrected(r) {
+		t.Errorf("a claim over public_link get passed uncorrected: %q", r)
+	}
+	// An undo that had nothing to revert is not a change either.
+	history, _, _ := svc.GardenHistory(ctx, owner, g.ID, 1, 0)
+	if len(history) > 0 {
+		if _, _, err := svc.RevertChangeSet(ctx, owner, history[0].ID, domain.SourceUI); err != nil {
+			t.Fatalf("pre-revert: %v", err)
+		}
+		if r := run(toolCall("undo_change", map[string]any{"changeSetId": history[0].ID}), fake.Reply("Undone — it's back the way it was.")); !corrected(r) {
+			t.Errorf("a claim over an undo that reverted nothing passed uncorrected: %q", r)
+		}
+	}
 	// A real deletion: the claim stands.
 	r := run(toolCall("delete_journal_entry", map[string]any{"entryId": entry.ID}), fake.Reply("Done — I've deleted the journal entry."))
 	if corrected(r) {
 		t.Errorf("a true claim was corrected: %q", r)
 	}
+	// A read-only answer that happens to open with a participle is left alone.
+	if r := run(toolCall("describe_garden", map[string]any{"gardenId": g.ID}), fake.Reply("Updated totals: 0 plantings. Nothing is in the ground.")); corrected(r) {
+		t.Errorf("an informational reply was corrected: %q", r)
+	}
 	if _, _, err := svc.ListJournal(ctx, owner, g.ID, service.JournalQuery{}); err != nil {
 		t.Fatalf("journal after: %v", err)
 	}

internal/agent/tools.go

@@ -277,6 +277,10 @@ type adapter struct {
 	today string
 
 	mu sync.Mutex
+	// changed is set by the tools whose success does not itself mean a change
+	// — public_link (get reads) and undo_change (nothing left to revert) — when
+	// they did change something, for Run's honesty check.
+	changed bool
 	// reverts is every change set undo_change produced this turn. A revert is
 	// its own change set (it points back at the one it undid, and the target is
 	// marked undone), so it never joins the turn's scope — which leaves a turn
@@ -285,6 +289,20 @@ type adapter struct {
 	reverts []int64
 }
 
+// noteChange records that a self-reporting tool changed something.
+func (a *adapter) noteChange() {
+	a.mu.Lock()
+	a.changed = true
+	a.mu.Unlock()
+}
+
+// didChange reports whether a self-reporting tool changed something this turn.
+func (a *adapter) didChange() bool {
+	a.mu.Lock()
+	defer a.mu.Unlock()
+	return a.changed
+}
+
 // lastRevert is the newest change set undo_change produced this turn, if any.
 func (a *adapter) lastRevert() *int64 {
 	a.mu.Lock()
@@ -393,8 +411,9 @@ func (a *adapter) moveObject(ctx context.Context, args struct {
 	YCM      float64 `json:"yCm" description:"new center y in garden cm"`
 	Version  int64   `json:"version" description:"the object's current version (from describe_garden)"`
 }) (any, error) {
-	return a.svc.UpdateObject(ctx, a.actor, args.ObjectID,
+	o, err := a.svc.UpdateObject(ctx, a.actor, args.ObjectID,
 		service.ObjectPatch{XCM: &args.XCM, YCM: &args.YCM}, args.Version)
+	return o, whenMissing(err, "object", args.ObjectID, "describe_garden")
 }
 
 func (a *adapter) placePlanting(ctx context.Context, args struct {
@@ -510,11 +529,12 @@ func (a *adapter) updatePlant(ctx context.Context, args struct {
 	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{
+	p, err := 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)
+	return p, whenMissing(err, "plant of the user's own", args.PlantID, "find_plant")
 }
 
 func (a *adapter) addJournalEntry(ctx context.Context, args struct {
@@ -542,7 +562,7 @@ func (a *adapter) clearObject(ctx context.Context, args struct {
 	}
 	n, err := a.svc.ClearPlantings(ctx, a.actor, args.ObjectID, service.ClearOptions{RemovedAt: on})
 	if err != nil {
-		return nil, err
+		return nil, whenMissing(err, "object", args.ObjectID, "describe_garden")
 	}
 	return map[string]int{"cleared": n}, nil
 }
@@ -563,7 +583,7 @@ func (a *adapter) removePlantings(ctx context.Context, args struct {
 	n, err := a.svc.ClearPlantings(ctx, a.actor, args.ObjectID,
 		service.ClearOptions{PlantID: &args.PlantID, RemovedAt: on})
 	if err != nil {
-		return nil, err
+		return nil, whenMissing(err, "object", args.ObjectID, "describe_garden")
 	}
 	return map[string]int{"removed": n}, nil
 }
@@ -727,6 +747,7 @@ func (a *adapter) undoChange(ctx context.Context, args struct {
 	}
 	a.mu.Lock()
 	a.reverts = append(a.reverts, cs.ID)
+	a.changed = true
 	a.mu.Unlock()
 	return res, nil
 }
@@ -795,17 +816,18 @@ func (a *adapter) updateObject(ctx context.Context, args struct {
 	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{
+	o, err := 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)
+	return o, whenMissing(err, "object", args.ObjectID, "describe_garden")
 }
 
 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 nil, whenMissing(err, "object", args.ObjectID, "describe_garden")
 	}
 	return map[string]any{"deleted": args.ObjectID}, nil
 }
@@ -974,7 +996,7 @@ func (a *adapter) deletePlant(ctx context.Context, args struct {
 		return nil, fmt.Errorf("%w: the plant is still used — by plantings (past seasons count) or a seed lot — so it stays; tell the user rather than removing those", domain.ErrPlantInUse)
 	}
 	if err != nil {
-		return nil, err
+		return nil, whenMissing(err, "plant of the user's own", args.PlantID, "find_plant")
 	}
 	return map[string]any{"deleted": args.PlantID}, nil
 }
@@ -1164,5 +1186,8 @@ func (a *adapter) publicLink(ctx context.Context, args struct {
 	if err != nil {
 		return nil, err
 	}
+	if action != "get" {
+		a.noteChange()
+	}
 	return a.linkOf(link), nil
 }