fable-validate-fableplan-loop

# fable-validate-fableplan-loop Chain fable-validate → (conditional) update issue → fableplan → work-on-issue-loop into one autonomous run: Fable 5 validates the issue, the main agent fixes the issue description if needed, Fable 5 plans the implementation (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 the Capability gate removed** — the only difference is that fableplan **always runs**, regardless of the validated complexity score; there is no "skip when Capability < 2 / score < 50" rule. Reach for this when even simple issues should get a posted, Fable-vetted plan before implementation (e.g. the plan comment doubles as documentation, or the repo's simple-looking issues have a history of hiding traps). If skipping the plan for low-capability-band issues is fine, use `fable-validate-loop` instead — it's the cheaper default. **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). There is **no sanctioned skip** in this variant — every step runs; only the "wait for the user's reply" moments are replaced by the decision rules below. ## Input Same defaults as fable-validate: issue URL, `#<N>` / `<N>` / `owner/repo#N`, or nothing (defaults to the latest open issue in the current repo). ## Steps ### 1. Run fable-validate Invoke the `fabl...