fix(bootstrap): lower no-mistakes version floor from 1.31.2 to 0.40.0

[desnor]

Intent

Lower the no-mistakes version floor constant NO_MISTAKES_MIN from 1.31.2 to 0.40.0 in bin/fm-bootstrap.sh, and update all version references throughout the codebase including comments, documentation, bootstrap-diagnostics SKILL.md, and all test files from 1.31.2 to 0.40.0 so bootstrap no longer reports the installed no-mistakes 0.40.0 binary as MISSING.

What Changed

• Lowered NO_MISTAKES_MIN constant in bin/fm-bootstrap.sh from 1.31.2 to 0.40.0 so bootstrap correctly recognises installed no-mistakes 0.40.0 binaries as present rather than reporting them as MISSING.
• Updated all version references (comments, documentation, CONTRIBUTING.md, docs/configuration.md, and bootstrap-diagnostics/SKILL.md) from 1.31.2 to 0.40.0.
• Updated fake no-mistakes version fixtures in all test files to 0.40.0 to match the new floor.

Risk Assessment

✅ Low: All version references from 1.31.2 to 0.40.0 are consistently updated across source, docs, and tests; the integer-based comparison function handles the new 0.x floor correctly; and all four round-1 findings have been properly resolved.

Testing

Ran test_no_mistakes_min_version in isolation (5 cases: v0.40.0 exact floor → silent, v0.41.0 → silent, v1.0.0 → silent, v0.39.9 below floor → MISSING message, unparseable → MISSING message). All cases passed. No 1.31.2 references remain anywhere in the codebase. A pre-existing test_routine_bootstrap_confirmations_are_silent failure due to GPG signing not being available in the gate worktree environment is unrelated to this change.

Evidence: test_no_mistakes_min_version output

Source: test_no_mistakes_min_version output

=== test_no_mistakes_min_version ===

Test cases exercised:
  1. minimum no-mistakes version is accepted   -> v0.40.0 (exact floor) -> expects silence
  2. newer no-mistakes minor is accepted       -> v0.41.0               -> expects silence
  3. newer no-mistakes major is accepted       -> v1.0.0                -> expects silence
  4. older no-mistakes patch reports upgrade   -> v0.39.9 (below floor) -> expects MISSING message
  5. unparseable version reports upgrade       -> 'development build'   -> expects MISSING message

=== Result ===
ok - bootstrap enforces no-mistakes minimum version
Exit: 0

=== NO_MISTAKES_MIN in bin/fm-bootstrap.sh ===
NO_MISTAKES_MIN=0.40.0
  if command -v no-mistakes >/dev/null 2>&1 && ! tool_version_at_least no-mistakes "$NO_MISTAKES_MIN"; then

Pipeline

Updates from git push no-mistakes

✅ **intent** - passed

✅ No issues found.

✅ **Rebase** - passed

✅ No issues found.

✅ **Review** - passed

✅ No issues found.

✅ **Test** - passed

✅ No issues found.

• bash tests/fm-bootstrap.test.sh (targeted via awk-extracted runner calling only test_no_mistakes_min_version)
• Manual grep confirming zero remaining 1.31.2 references across all 11 changed files

⏭️ **Document** - skipped

Step was skipped.

⚠️ **Lint** - 1 warning

• ⚠️ linter found issues (exit code 1)

✅ **Push** - passed

✅ No issues found.

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

_{Reviews (3): Last reviewed commit: "docs: add policy comment for NO_MISTAKES..." | Re-trigger Greptile}