Spec Orchestrator

1. Purpose

Orchestrates the full pre-implementation documentation pipeline:

[Gather] → [Expand] → BRD → PRD → FSD → TRD

Stages 1–2 collect raw information. Stages 3–6 produce documents — each followed by an iterative review loop that refines the document until the reviewer finds zero problems (or max_review_iterations is reached).

PRD is mandatory. All other stages are optional and skippable.

2. Stage Table

Skipping stages

Set skip_stages to an array of stage keys. "prd" cannot be skipped — it causes an immediate validation error. Unknown keys produce a warning and are ignored.

Early exits (before any stage runs)

• request is empty or a single word → STATUS: NEEDS_CONTEXT. No files created.
• prd-creator skill is absent from the runtime → STATUS: BLOCKED. No files created.

Optional stage not found

When an optional stage's skill is absent from the runtime, mark the stage SKIPPED (logged as "Skill not found") and continue.

Creator failure

• Optional stage creator fails → stage marked SKIPPED. Pipeline continues.
• PRD creator fails → write log with STATUS: BLOCKED. Pipeline stops.

3. Artifact Location

<JOBS_ROOT>/<job-name>/
  raw-requirements.md
  brainstorm.md
  brd.md
  prd.md            ← mandatory
  fsd.md
  trd.md
  spec-pipeline-log.md

Job name derivation (when job_name not provided): lowercase → strip punctuation (keep spaces) → first 5 words → replace spaces with hyphens. Example: "Add JWT auth!" → add-jwt-auth. Auto-append -2, -3... on collision.

4. Stages 1–2: Gather and Expand

Invoke each sub-skill with mode: "batch". If a skill doesn't support batch mode, use the fallback below. If the skill is absent entirely, mark the stage SKIPPED.

Stage 1 batch envelope:

{ "mode": "batch", "request": "<request>", "output_path": "<JOBS_ROOT>/<job-name>/raw-requirements.md" }

Fallback (batch unsupported): write request content directly to raw-requirements.md; mark DONE.

Stage 2 batch envelope:

{
  "mode": "batch",
  "request": "<request>",
  "upstream": { "raw_requirements": "<raw-requirements.md content or null>" },
  "output_path": "<JOBS_ROOT>/<job-name>/brainstorm.md"
}

Fallback (batch unsupported): spawn a general-purpose sub-agent with request + raw_requirements as context to produce brainstorm.md; mark DONE.

5. Review Loop (stages 3–6)

5.1 Reviewer Model Resolution

Resolved once at startup, used for all reviewer invocations. Priority order (highest first):

1. reviewer_model input field
2. GOODAI_SPEC_REVIEWER_MODEL env var
3. Provider detection:
   • ANTHROPIC_API_KEY set or session model contains claude → cheapest available Haiku model (verify in Anthropic catalogue at implementation time; at spec-writing time: claude-haiku-4-* family)
   • OPENAI_API_KEY set or session model contains gpt/o1/o3/o4 → gpt-4o-mini
   • OPENROUTER_API_KEY or OPENAI_BASE_URL set → omit model param
   • None of the above → omit model param

5.2 Loop Pseudocode

# Generation pass
content = creator({ request, upstream, upstream_warnings })
# brd/fsd/trd-creator return content; prd-creator writes to output_path itself (content=None)
if content is not None:
    write(artifact_path, content)
artifact_content = read(artifact_path)

fixer_calls = 0
problems = []
while fixer_calls < max_review_iterations:
    result = reviewer({
        request, artifact_path, artifact_content,
        codebase_path,   # null for BRD/PRD
        upstream_artifacts,   # all prior artifacts available to this stage
        mission_instruction
    })
    problems = result["problems"]
    if len(problems) == 0:
        break
    content = creator({ request, upstream, current_draft: artifact_content,
                        reviewer_findings: problems, upstream_warnings })
    if content is not None:
        write(artifact_path, content)
    artifact_content = read(artifact_path)
    fixer_calls += 1

# Final reviewer pass after max iterations
if fixer_calls == max_review_iterations and len(problems) > 0:
    result = reviewer({ ..., artifact_content })
    problems = result["problems"]

stage_status = DONE if len(problems) == 0 else DONE_WITH_CONCERNS

max_review_iterations defaults to 5. Values ≤ 0 are reset to 5 with a log warning.

5.3 Reviewer Input Contract

The reviewer is a sub-agent (no separate SKILL.md). It receives full upstream context — not a clean-context call — so it can check cross-artifact consistency:

{
  "request":            "<original user request>",
  "artifact_path":      "<path to the document being reviewed>",
  "artifact_content":   "<full document text>",
  "codebase_path":      "<path or null>",
  "upstream_artifacts": {
    "raw_requirements": "<content or null>",
    "brainstorm":       "<content or null>",
    "brd":              "<content or null>",
    "prd":              "<content or null>",
    "fsd":              "<content or null>"
  },
  "mission_instruction": "<stage-specific instruction below>"
}

BRD and PRD mission instruction:

"Review this document for completeness and internal consistency. Use the upstream artifacts and original request to check that requirements are covered and nothing contradicts them. Return JSON: {\"problems\": [{\"id\": \"P-N\", \"location\": \"<section>\", \"severity\": \"blocker|major|minor\", \"description\": \"<what and why>\"}]}. If no problems: {\"problems\": []}. Keep each description to 1 sentence. No prose before or after JSON."

FSD and TRD mission instruction:

"Review this document for completeness and internal consistency. Use the upstream artifacts to check cross-document consistency. If codebase_path is not null, also verify that technology and architecture claims match the actual codebase. Return JSON: {\"problems\": [{\"id\": \"P-N\", \"location\": \"<section>\", \"severity\": \"blocker|major|minor\", \"description\": \"<what and why>\"}]}. If no problems: {\"problems\": []}. Keep each description to 1 sentence. No prose before or after JSON."

Pass only the artifacts that were produced by prior stages; set others to null.

Invalid reviewer response: retry once. If second call is also invalid, mark stage DONE_WITH_CONCERNS and log the failure.

5.4 DONE_WITH_CONCERNS Propagation

A stage that exits DONE_WITH_CONCERNS passes its artifact to downstream stages unchanged. Add an entry to upstream_warnings for each DONE_WITH_CONCERNS stage so downstream creators are aware.

6. Sub-Agent Envelopes

6.1 brd-creator (generation)

{
  "request": "<request>",
  "upstream": { "raw_requirements": "<content or null>", "brainstorm": "<content or null>" },
  "upstream_warnings": ["<notes>"]
}

6.2 brd-creator (refinement)

{
  "request": "<request>",
  "upstream": { "raw_requirements": "<content or null>", "brainstorm": "<content or null>" },
  "current_draft": "<brd.md content>",
  "reviewer_findings": [{ "id": "P-N", "location": "...", "severity": "...", "description": "..." }],
  "upstream_warnings": ["<notes>"]
}

6.3 prd-creator (generation)

{
  "mode": "orchestrated",
  "initialRequest": "<request>",
  "upstream_context": "<first available: brd.md → brainstorm.md → raw-requirements.md → null>",
  "metadata": { "output_path": "<JOBS_ROOT>/<job-name>/prd.md" },
  "upstream_warnings": ["<notes>"]
}

6.4 prd-creator (refinement)

{
  "mode": "orchestrated",
  "initialRequest": "<request>",
  "upstream_context": "<same as generation call>",
  "metadata": { "output_path": "<JOBS_ROOT>/<job-name>/prd.md" },
  "current_draft": "<current prd.md content>",
  "reviewer_findings": [{ "id": "P-N", "location": "...", "severity": "...", "description": "..." }],
  "upstream_warnings": ["<notes>"]
}

prd-creator writes prd.md to metadata.output_path itself. After each invocation, read prd.md from that path to get artifact_content.

6.5 fsd-creator (generation)

{
  "request": "<request>",
  "upstream": { "brd": "<content or null>", "prd": "<prd.md content>" },
  "codebase_path": "<path or null>",
  "upstream_warnings": ["<notes>"]
}

6.6 fsd-creator (refinement)

Add "current_draft" and "reviewer_findings" to the generation envelope.

6.7 trd-creator (generation)

{
  "request": "<request>",
  "upstream": { "brd": "<content or null>", "prd": "<prd.md content>", "fsd": "<content or null>" },
  "codebase_path": "<path or null>",
  "upstream_warnings": ["<notes>"]
}

6.8 trd-creator (refinement)

Add "current_draft" and "reviewer_findings" to the generation envelope.

7. Input Contract

8. Output Contract

STATUS: DONE | DONE_WITH_CONCERNS | BLOCKED | NEEDS_CONTEXT

• DONE — all active document stages completed with zero remaining problems.
• DONE_WITH_CONCERNS — at least one stage's final reviewer pass left unresolved problems.
• BLOCKED — prd-creator missing at startup, or PRD creator failed at runtime.
• NEEDS_CONTEXT — request too short to act on.

9. Pipeline Log (spec-pipeline-log.md)

Not written for NEEDS_CONTEXT or startup BLOCKED exits. Written for all other exits including runtime PRD BLOCKED.

# Spec Pipeline Log

## Run metadata
- job: <job-name>
- started_at: <ISO timestamp>
- reviewer_model: <resolved model id, gpt-4o-mini, or model_omitted>
- skip_stages: [<list or "none">]
- max_review_iterations_effective: <N>

## Stage results

### Stage N: <Name>
- status: DONE | DONE_WITH_CONCERNS | SKIPPED | BLOCKED
- fixer_invocations: <N or N/A>
- reviewer_invocations: <N or N/A>
- artifact: <path or "none">
- problems_found_initial: <count or N/A>
- problems_remaining: <count or N/A>

<If problems_remaining > 0, list findings from final reviewer pass>

## Final status
STATUS: DONE | DONE_WITH_CONCERNS | BLOCKED

10. Implementation Steps

1. Create skills/spec-orchestrator/SKILL.md ← this file
2. Create skills/brd-creator/SKILL.md and skills/brd-creator/input-contract.schema.json
3. Create skills/fsd-creator/SKILL.md and skills/fsd-creator/input-contract.schema.json
4. Create skills/trd-creator/SKILL.md and skills/trd-creator/input-contract.schema.json
5. Modify skills/prd-creator/SKILL.md — document orchestrated mode refinement behavior; document that prd-creator writes to metadata.output_path in orchestrated mode
6. Modify skills/prd-creator/input-contract.schema.json — add optional fields: upstream_context (string|null), metadata.output_path (string), current_draft (string), reviewer_findings (array), upstream_warnings (array)
7. Update AGENTS.md routing entries for all new/modified skills
8. Run cd scripts && bun run generate-agents
9. Bump CHANGELOG.md
10. Run cd scripts && bun test — confirm all existing tests pass