Four defects found by pointing the FN-182 pipeline-smoke harness at a review-gated
workflow. Three of them also affected builtin:review-gated-coding, where they had
been latent because that graph dies earlier on the review seal.
1. `planning-implementation-only` is a PROMPT key, never an executable seam.
`resolveSeamName` accepts exactly seven seam names and throws
`Unsupported workflow seam` otherwise, so the `plan` node threw on every task:
the graph failed at `plan`, the card bounced to todo, and the board reported
"Execution dispatch refused — task is still unplanned" — pressing Start
appeared to do nothing. The seam is now `planning`; only the prompt differs.
2. The seam prompt contradicted itself. It was the full triage prompt — whose
template MANDATES `### Step {N-1}: Testing & Verification` and
`### Step {N}: Documentation & Delivery` — plus one appended line asking for
neither. The template won, so tasks emitted both steps and ran them in
in-progress, duplicating the review gates. The template region is now removed
and replaced by an explicit prohibition. The parse node's
`implementationOnlySteps` is not a backstop: it only audits, by design.
3. `requireImplementationOnlySteps` was inert when set on an already-built
plan-review node: the prompt is assembled by `planReviewOptionalGroupNode`
and no engine code reads the flag, so the reviewer never received its
criterion. Both derived workflows now call `applyImplementationOnlyStepReview`.
4. Write-capable graph nodes declared no session boundary on workspace tasks, so
the single-repo assertion resolved the task DIRECTORY (a container of per-repo
worktrees, no `.git`) as a worktree and refused: "Refusing to start coding
agent in incomplete worktree", failing the gate before a verdict and requeuing
the task. FN-158 gave Code Review the `workspace-task-dir` boundary but not the
generic prompt path. Extracted as a pure `resolveGraphNodeSessionBoundary`.
Also reorders coding-ideas-v2 to `verification -> documentation-delivery ->
completion-summary -> code-review -> merge`. The summary escapes the review seal
(readonly) but still acquires a worktree, and any node between the review and the
merge invalidates FN-180's review-diff fingerprint.
Known incomplete: builtin:coding-ideas-v2 still does not converge end to end —
pipeline-smoke S01 reaches merge and is refused with "task has no provable
approval for the content being merged". Not yet root-caused; the workflow must be
treated as unusable until it is.
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