Double Check
Automatic final verification pass on completed deliverables.
Install
npx skills add mrtooher/fable-mode --skill double-check -g -a claude-code -y- Repository
- mrtooher/fable-mode882
- Category
- AI and agents
- Updated
- 11d ago
- License
- See repository
- Context cost
- Mediumabout 2,836 tokens
- Runs scripts
- No, instructions only
What it does
Automatic final verification pass on completed deliverables. Runs at the end of every fable-mode run, those skills invoke it before delivery. Also triggers when the user says \"double check this\". Uses a panel of fresh checker agents when spawning is authorized (otherwise a cold self-check) to verify the finished output, not to redo the task. Any FAIL gets fixed and re-checked before delivery.
Double Check
Family version: v6 (2026-10-10).
Automatic verification pass on a finished deliverable. The user should never have to re-check work themselves, this skill is that re-check.
This skill is both the gate (when verification runs, on what, and what happens to a FAIL) and the mechanism (how to brief a cold verifier so it checks the world instead of your argument). Both live here, there is no companion skill to load.
What it is and is not
- It verifies outputs, it does not re-run the task. A full second run produces a second divergent version and a comparison problem; attacking the finished artifact catches the same errors at a fraction of the cost.
- It runs after the work is complete and before it is delivered.
- It never runs on its own output. One double-check per deliverable. Fixes triggered by a FAIL get their specific failed check re-run, not a whole new panel. No recursion.
When it runs
- Automatically at the end of any fable-mode run (fable-mode, fable-opus,
fable-sonnet). Those skills call this one as their final delivery gate. Exception: if
a fable run already executed a cold verification of the final deliverable, do not
duplicate it, run only the seam check (section "Check the synthesis seam") and skip
the rest. Do not infer this from the narrative: the run closes its report with a
FINAL-COLD-CHECK:line.yes→ seam check only.intermediates-only,no, or no line at all → run the full checks (panel or self-check mode, per below). Absence of the line is never evidence that the check happened. - On request: "double check this", "verify this", "make sure this is right".
