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14 changes: 13 additions & 1 deletion skills/old-coder/SKILL.md
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
---
name: old-coder
description: Evidence-first development — surround the implementation with an executable spec and a gauntlet of constraints (tests, types, coverage, mutation) so line-by-line review becomes optional. Use when the user explicitly asks for high-assurance or evidence-first work ("reliable", "TDD", "prove it works", "I won't read the code"), or when the change touches high-stakes domains (money, auth, data loss, concurrency, public API). For routine changes where the user just wants normal tests, write good tests directly instead of invoking this loop.
description: Evidence-first development — surround the implementation with an executable spec and a gauntlet of constraints (tests, types, coverage, mutation) so line-by-line review becomes optional. Use when the user explicitly asks for high-assurance or evidence-first work ("reliable", "TDD", "prove it works", "I won't read the code"). Also load it when the user did NOT ask but the change touches a high-stakes domain (money, auth, data loss, concurrency, public API) — in that case the first and only act is to OFFER the loop in one sentence and stop, so a wrong guess costs a sentence and no files; but only where a reply is possible — an autonomous run records the domain and proceeds. For routine changes where the user just wants normal tests, write good tests directly instead of invoking this loop.
---

# Old Coder: Reliable Coding Under Constraint and Test
Expand All @@ -11,6 +11,18 @@ you write code, and (2) an **evidence report** proving the code ran the gauntlet
Your job is to make those two artifacts trustworthy enough that line-by-line
review becomes optional within the spec's boundaries.

## First: was this loop asked for?

- **Nobody asked; you loaded this on the high-stakes heuristic** (money, auth,
data loss, concurrency, public API): offer in one sentence — name the domain,
give two choices (the full loop, or a normal fix with good tests) — then stop.
- **Create nothing before the answer**: no spec, no setup plan, no branch.
- **A configured invocation naming this skill IS the ask** (a scheduled wake, a
loop prompt, another agent's task) — start at step 1, do not re-offer it.
- **Nobody to answer?** Never stall. Record the domain and proceed under step 1's
autonomous rules, with spec approval `not obtained (autonomous run)`.
- **The offer is not spec approval** — a yes authorizes the loop, not the spec.

This inverts the normal review model: **trust moves from inspection to
constraints.** Be honest about what that buys: the gauntlet turns the
constraints the spec expresses into executable evidence — it cannot show the
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