validate-fableplan-loop

Chain validate-issue → (conditional) update issue → (conditional) fableplan → work-on-issue-loop into one autonomous run: your session model validates the issue against the code, the main agent fixes the issue description if needed, Fable 5.1 plans the implementation for non-trivial issues (plan posted to the issue), and work-on-issue-loop implements the plan and drives the PR through review to convergence.

This is fable-validate-loop with validation run through the plain validate-issue skill on your session model instead of a Fable 5.1 subagent. Only the planning is delegated to Fable 5.1, and only when the issue is complex enough to warrant it. Reach for this over fable-validate-loop when you want cheaper, session-model validation but still want a Fable-vetted plan for the harder issues.

Do not skip or reorder the chain. Validation gates planning (a plan built on refuted claims is wrong), and the plan gates implementation (that's the point of routing through fableplan). The only sanctioned skip is the step-4 score gate (a verdict signal of fableplan: no, which means both the title score and the recomputed score are below 71, bypasses fableplan). Every other step of each skill still runs; only the "wait for the user's reply" moments are replaced by the decision rules in the cited steps.

Input

Same defaults as validate-issue: issue URL, #<N> / <N> / owner/repo#N, or nothing (defaults to the latest open issue in the current repo).

Optional targetBranch (orchestration form { issue, targetBranch } or a prose "target branch "): passed unchanged to every validate, plan, and build step in the chain, so the baseline and the PR base are that branch instead of the repo default. work-on-issue step 1 ("Target") owns its validation.

Steps

Follow fable-validate-loop steps 1 through 6 with these changes:

Step 1 (validation): invoke the plain validate-issue skill (Skill tool, skill: validate-issue) instead of fable-validate. Let it run its full process — steps 0 through 8 — and produce the standard verdict block:

**#<N>: Update issue description? <Yes|No>**  ·  Complexity: <score>/100 — Capability <k> (Risk <r>, Uncertainty <u> — <driver>); Volume <v> (Scope <s>, Coupling <c>, Verification <x>) · fableplan: <yes|no>  ·  Scope: <OK | too large — split/umbrella/narrow>

Treat the verdict as structured output to parse yourself, and don't ask the user to confirm. Record the resolved issue number; every later step targets exactly this issue.

Step 2 (scope gate): the same four STOP conditions apply, sourced from the plain validation (the already-addressing PR comes from validate-issue's step 1 linked-PR check; too large from validate-issue step 7):

Condition	Action
Scope: too large (split / umbrella / narrow flagged)	STOP. Report the disposition and proposed parts — splitting is a human call.
Architecture marked ❌ Infeasible	STOP. Report the infeasibility and the "Optimal direction" note.
A merged PR already implements the fix	STOP. Report the PR and the close/repurpose recommendation.
An open PR is already addressing the issue	STOP. Report the overlapping PR; supersede/join/wait is a human call.

Step 3 (update-issue edits): apply validate-issue's step 11 (this chain has no fable-validate step), from the current checkout (no worktree for issue edits, per validate-issue step 0). The stacked Validated with LLM: … attribution line uses the harness suffix validate-fableplan-loop and names the session model that ran the validation; the Fable 5.1 model string in fable-validate-loop's step 3 does not apply here.

Step 4 (fableplan): Score gate: a verdict signal of fableplan: no, which validate-issue step 8 emits only when the title score and the recomputed score are both below 71, skips fableplan — go straight to step 5. Never read the raw Complexity: value for this gate; the title score is the floor. Safety carve-out (overrides the gate): if the validation flags money, data integrity, security, or an auto-protective mechanism anywhere in its findings, run fableplan regardless of score. The top-band note applies unchanged. When fableplan runs, give the planning subagent the validation findings (the verdict block and validate-issue's report) alongside the issue, and instruct fableplan to use the harness suffix validate-fableplan-loop in the posted comment's attribution footer.

Step 5 (handoff) applies unchanged — including that deviations follow work-on-issue step 2's plan-deviation policy and must each be named in the PR body.

Step 6 (report) applies unchanged. Cap the whole report at 55 words, plain simple English in ASD-STE100 — apply the Response Style rules in CLAUDE.md/AGENTS.md.

Red Flags — STOP

fable-validate-loop's Red Flags table applies, reading "validate-issue" wherever it says "fable-validate".