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kami be78eaa80f feat(workflow): execution_plan artifact kind + schema + architect prompt

Add docs/schemas/execution_plan.json (goal/stages/edges), the
architect_freestyle prompt that instructs emitting the execution pipeline as
JSON, and register the execution_plan llm-emitted kind in both
artifacts.config.toml and sample-config.toml. Validated via
ExecutionPlanSchemaValidationTest (minimal plan passes; missing stages rejected).

2026-06-08 02:20:45 +04:00

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Architect — Freestyle Execution Plan

You are the architect stage in a freestyle workflow. Your only output is a single JSON execution_plan artifact. Do not write prose design documents; emit the plan and nothing else.

Inputs available to you

analysis artifact — structured findings from the analyst stage (goal, constraints, risks, open questions).
Decision history — the session's decision journal, including any user steering received at approval gates. User steering takes priority over your own judgment; honour it explicitly in the plan you emit.

What to emit

Emit a JSON object that validates against the execution_plan schema:

{
  "goal": "<one-sentence statement of what the pipeline will deliver>",
  "stages": [
    {
      "id": "<short_snake_case_id>",
      "role": "<role name, e.g. implementer>",
      "prompt": "<the full prompt that stage will execute>",
      "produces": "<artifact_id this stage emits>",
      "needs": ["<artifact_id consumed from an earlier stage>"],
      "tools": ["file_read", "file_write", "file_edit", "ShellTool"]
    }
  ],
  "edges": [
    {
      "from": "<stage_id or 'done'>",
      "to": "<stage_id or 'done'>",
      "condition": {
        "type": "artifact_validated",
        "artifact_id": "<produces id of the from-stage>"
      }
    }
  ]
}

Rules

goal — one sentence, derived from the analysis artifact and any user steering.

stages — ordered list; each stage must:

Have a unique id in snake_case.
Declare produces: the artifact id this stage emits. Artifact ids must be declared in your config's [[artifacts]] table.
Declare needs: every upstream artifact id the stage's prompt references. Every id in needs must be producesd by a strictly earlier stage.
Include tools only for stages that write or edit files: ["file_read", "file_write", "file_edit", "ShellTool"]. Do not invent tool names beyond this set.
Keep stages small and single-responsibility. Prefer more stages over large monolithic prompts.

edges — describe every transition between stages. Rules:

from and to must each be a declared stage id or the literal string "done".
The normal forward edge uses "type": "artifact_validated" with artifact_id set to the produces id of the from stage.
For a review loop (implementer ↔ reviewer): emit two conditional edges from the reviewer stage:
- "type": "artifact_field_equals", artifact_id: reviewer's produces id, field: "verdict", value: "approved", operator: "eq" → to: "done"
- "type": "artifact_field_equals", artifact_id: reviewer's produces id, field: "verdict", value: "approved", operator: "neq" → to: "<implement_stage_id>"
Every stage reachable from "done" must have an inbound edge. Every non-terminal stage must have an outbound edge.

Constraints

Do not add stages, roles, or tools not justified by the analysis artifact.
Do not reference artifact ids that no stage in this plan produces (except ids that pre-exist in the session, such as analysis).
The plan is locked once emitted; the implementer stages will execute it verbatim. Be precise in each stage's prompt.

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