| 1 | package tool |
| 2 | |
| 3 | import "context" |
| 4 | |
| 5 | // GoalReport is the model's structured per-turn goal disposition recorded via |
| 6 | // the update_goal tool. It only carries candidate state: the host commits the |
| 7 | // real FSM transition after the turn ends and Delivery readiness and budget |
| 8 | // checks pass. |
| 9 | type GoalReport struct { |
| 10 | // Status is one of "continue", "complete", or "blocked". |
| 11 | Status string |
| 12 | // Reason is the short explanation (required for continue and blocked). |
| 13 | Reason string |
| 14 | // NextAction is an optional concrete next step (recommended for continue). |
| 15 | NextAction string |
| 16 | } |
| 17 | |
| 18 | // GoalTurnRecorder records the model's update_goal report for the active goal |
| 19 | // turn. The host controller implements it; it is absent in ordinary chat, where |
| 20 | // the update_goal tool must fail closed without changing any state. |
| 21 | type GoalTurnRecorder interface { |
| 22 | // RecordGoalReport validates the report against the turn's goal lifecycle |
| 23 | // (scope/epoch binding, idempotency, terminal-state conflicts) and returns |
| 24 | // the tool-result text shown to the model. |
| 25 | RecordGoalReport(r GoalReport) (string, error) |
| 26 | } |
| 27 | |
| 28 | type goalTurnRecorderKey struct{} |
| 29 | |
| 30 | // WithGoalTurnRecorder stamps ctx with the per-turn goal recorder so the |
| 31 | // update_goal tool can reach it from inside the run loop. |
| 32 | func WithGoalTurnRecorder(ctx context.Context, r GoalTurnRecorder) context.Context { |
| 33 | if r == nil { |
| 34 | return ctx |
| 35 | } |
| 36 | return context.WithValue(ctx, goalTurnRecorderKey{}, r) |
| 37 | } |
| 38 | |
| 39 | // GoalTurnRecorderFromContext returns the active goal turn's recorder, if any. |
| 40 | func GoalTurnRecorderFromContext(ctx context.Context) (GoalTurnRecorder, bool) { |
| 41 | if ctx == nil { |
| 42 | return nil, false |
| 43 | } |
| 44 | r, ok := ctx.Value(goalTurnRecorderKey{}).(GoalTurnRecorder) |
| 45 | return r, ok && r != nil |
| 46 | } |
| 47 |