Files
msd-core/gsd-core/references/debugger-philosophy.md
Tom Boucher 463cffd894 chore(#604): rename get-shit-done/ runtime directory to gsd-core/ (#615)
* chore(#604): rename get-shit-done/ runtime directory to gsd-core/

Renames the installed runtime directory `get-shit-done/` to `gsd-core/` so the
on-disk name matches the package (`@opengsd/gsd-core`), repo, and binary
(`gsd-tools`). The npm package name and binary are unchanged; npx/npm consumers
are unaffected.

Mechanical (bulk, ~90% of the diff):
- `git mv get-shit-done gsd-core`
- Swept path/identifier references across the repo via
  `perl -pe 's/get-shit-done(?!-\w)/gsd-core/g'`. The negative lookahead
  preserves the five legitimate slug variants that are NOT the directory:
  get-shit-done-{OLD,cc,classic,cli,redux} (old package/repo names).
- Build/manifest wiring: package.json (bin, files, coverage globs),
  tsconfig.build.json (outDir), ~86 .gitignore build-output entries,
  stryker.config.mjs, scan-ignore files, install.js path strings.
- Frozen (not rewritten): CHANGELOG.md history; translated docs
  (README.<locale>.md and docs/{ja-JP,ko-KR,pt-BR,zh-CN}/).

New logic (review here):
- src/installer-migrations/003-rename-get-shit-done-to-gsd-core.cts: a proper
  ADR-0008 installer migration. On upgrade it walks the legacy
  `~/.claude/get-shit-done/` tree, classifies each file via the prior install
  manifest, and emits remove-managed / backup-and-remove for managed files
  while PRESERVING unknown user-added files. Symlink-safe (skips a symlinked
  root and symlinked entries; bounds-checks every path under configDir). The
  framework rolls back on install failure. Emptied dirs may remain (framework
  has no recursive dir-removal primitive) — documented.
- scripts/lint-legacy-dir-name.cjs: CI regression guard forbidding the bare
  `get-shit-done` directory token (split token to avoid self-match; case-
  insensitive; `(?!-\w)` lookahead allows the slug variants; allowlists
  CHANGELOG, translated docs, and `gsd-allow-legacy-name` marker lines).
  Wired into the lint-tests CI job.
- Restored scripts/lint-package-identity-drift.cjs detection regexes (the
  mechanical sweep had wrongly rewritten the old-name patterns it exists to
  detect) and marked them as intentional legacy references.
- TDD tests for the migration and the guard; do.md slash-command guard regex
  tightened so a `/gsd-core/bin` path segment is not mistaken for a command;
  changeset + docs/installer-migrations.md row added.

Breaking: the installed runtime path moves `~/.claude/get-shit-done/` ->
`~/.claude/gsd-core/`. Migration 003 removes the stale legacy dir's managed
files (preserving user files) on upgrade. Users with custom hooks/configs
hardcoding the old path must update them.

Closes #604

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): unsweep pending changesets + allowlist injection-example docs

CI fixes for the rename PR:
- Do not sweep pending .changeset/*.md (ephemeral release-note fragments,
  like CHANGELOG); reverted those body edits so 5 pre-existing malformed
  fragments (missing type/pr) no longer enter the PR diff and trip docs-lint.
  Allowlisted .changeset/ in the legacy-name guard accordingly.
- Allowlisted TEST-EXAMPLES.md and docs/explanation/security-model.md in
  prompt-injection-scan.sh: they contain intentional injection examples /
  security-model prose; the path-reference rewrites are kept.

CodeQL alerts on this PR are pre-existing (alert lines unchanged by this PR;
none in the new migration/guard) and are out of scope for the rename.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): resolve CodeQL alerts surfaced on this PR

The rename diff touched files carrying pre-existing CodeQL findings; per the
no-pre-existing-dismissal rule, fixing every surfaced alert rather than waving
them off. All behavior-preserving:

- scripts/ci-test-scope.cjs: build the config-path match from string
  .includes() instead of a RegExp over an arg-derived value (js/regex-injection).
- src/profile-output.cts: escape backslashes before pipe-escaping desc/safeName
  so the table-cell escape is complete (js/incomplete-sanitization).
- tests/{bug-2643,bug-2808,docs-parity-live-registry}: two-pass HTML-comment
  strip so a bare/unclosed `<!--` cannot survive (js/incomplete-multi-character-sanitization).
- tests/inline-plan-threshold: drop the no-op `\s`->`\s` identity replace,
  keep the meaningful POSIX-class conversion (js/identity-replacement).

Verified: build:lib green; the touched test files + ci-test-scope + profile-output
suites pass; lint:legacy-name clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): correctly resolve remaining CodeQL alerts (regex-injection + sanitization)

The prior commit's fixes for two alerts were ineffective:
- ci-test-scope.cjs js/regex-injection: the alert is the CLI-arg-derived `file`
  reaching static regex `.test(file)` calls (not the config rule). Removed ALL
  regex over file/t — startsWith/includes/=== string checks + an isWindowsHint
  helper — so there is no regex sink for the tainted value.
- js/incomplete-multi-character-sanitization (3 test files): a single
  `.replace(/<!--...-->/g,'')` can let `<!--` re-form. Replaced with a fixpoint
  loop (replace until stable) plus a final bare-opener strip.

Verified: no regex over file/t remains; ci-test-scope + the 3 test suites pass;
lint:legacy-name clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): make ci-test-scope + comment-strippers regex-free to clear CodeQL

CodeQL flags the regex PATTERNS syntactically (regex-injection on the
--files arg split; incomplete-multi-character-sanitization on the <!--...-->
replace), so loop fixes do not satisfy it. Made these paths regex-free:
- ci-test-scope.cjs splitFiles: char-by-char separator tokenizer (no /[,\\s]+/).
- 3 test files: indexOf/slice HTML-comment stripper (no .replace(/<!--/)).
Behavior preserved; ci-test-scope + the 3 suites pass; guard clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): unblock security base64 scan on the large rename diff

The security job hit its 10m timeout: base64-scan.sh choked on the binary
test fixture tests/feat-3594-parser-property-style.test.cjs (embedded NUL/
non-UTF8 bytes -> thousands of bogus blobs + "ignored null byte" warnings),
and the ~800-file rename diff is slow to scan regardless.

- scripts/base64-scan.sh: skip binary-by-content files (grep -Iq .) — they
  can't carry base64-obfuscated *text* and feeding NUL bytes through the
  per-line scanner is pathologically slow. collect_files already filtered
  binary *extensions*; this catches binary *content* in text extensions.
- .github/workflows/security-scan.yml: raise the security job timeout 10m->30m
  to accommodate very large diffs (the scan itself is unchanged).

Verified locally: scan skips the fixture, 0 "ignored null byte" warnings,
0 findings, exit 0.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): sweep get-shit-done refs introduced by merging next

The branch was updated with next (#614/#384/#618 etc.), which reference the
get-shit-done/ dir (still named that on next). Swept the stale references in
the merged files to gsd-core so the rename stays consistent and lint:legacy-name
passes:
- commands/gsd/discuss-phase.md (runtime-launcher shim paths)
- src/core.cts (getAgentsDir layout comments)
- tests/bug-384-agents-runtime-aware.test.cjs (require path to runtime lib)

Verified: guard 0 violations; build green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): exclude gsd-core/ path segments from bug-3683 command cross-ref invariant

The #614 runtime-launcher shim added to discuss-phase.md references
`${_GSD_RUNTIME_ROOT}/gsd-core/bin/...`. bug-3683's REF_PATTERN excluded path-y
refs only via lookbehind, but `}` precedes `/gsd-core/` in the shim, so it
mis-read the directory path as a dangling `/gsd-core` command ref (same class as
the #604 bug-2954 fix). Added a trailing `(?![\w-]*\/)` so `/gsd-<x>/...` path
segments are not treated as slash-command references.

Verified locally on BOTH platforms before pushing:
- mac (node 26) full suite: 0 failures
- gsd-test-runner (linux, node22 image) full suite: 0 failures
- bug-3683 + bug-2954 pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): lazily resolve findProjectRoot in gsd-tools (harden flaky CI)

CI intermittently failed state.test's gsd-tools subprocess with
"findProjectRoot is not a function" (flip-flopping across legs; not reproducible
on mac full suite, gsd-test linux full suite, test:unit, or state.test x8).
findProjectRoot is a re-export from core.cjs (sourced from project-root.cjs);
binding it via destructure at module-load can be undefined under a load-ordering
edge. Resolve it lazily at call time via a small wrapper so the lookup happens
after core.cjs is fully initialized.

Verified green on BOTH platforms before pushing:
- mac (node 26) full suite: 0 failures
- gsd-test-runner (linux, node22) full suite: 0 failures
- state.test.cjs: 106/106; gsd-tools loads cleanly.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#604): allowlist verification-patterns.md placeholder examples in secret scan

The rename git-mv'd references/verification-patterns.md into gsd-core/, pulling
it into the secret-scan diff. It documents stub/placeholder RED-FLAG env-var
examples (illustrative Stripe test-key / database-URL / API-key placeholders) —
not real credentials. Added it to .secretscanignore with the strict annotation,
mirroring the existing gsd-core/workflows/plan-phase.md exception.

Verified locally: secret-scan-lint --strict OK; secret-scan --diff origin/next
exits 0 with 0 findings.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-02 18:35:29 -04:00

3.2 KiB

Debugger Philosophy

Evergreen debugging disciplines — applies across every bug, every language, every system. Loaded by gsd-debugger via @file include.

User = Reporter, Claude = Investigator

The user knows:

  • What they expected to happen
  • What actually happened
  • Error messages they saw
  • When it started / if it ever worked

The user does NOT know (don't ask):

  • What's causing the bug
  • Which file has the problem
  • What the fix should be

Ask about experience. Investigate the cause yourself.

Meta-Debugging: Your Own Code

When debugging code you wrote, you're fighting your own mental model.

Why this is harder:

  • You made the design decisions - they feel obviously correct
  • You remember intent, not what you actually implemented
  • Familiarity breeds blindness to bugs

The discipline:

  1. Treat your code as foreign - Read it as if someone else wrote it
  2. Question your design decisions - Your implementation decisions are hypotheses, not facts
  3. Admit your mental model might be wrong - The code's behavior is truth; your model is a guess
  4. Prioritize code you touched - If you modified 100 lines and something breaks, those are prime suspects

The hardest admission: "I implemented this wrong." Not "requirements were unclear" - YOU made an error.

Foundation Principles

When debugging, return to foundational truths:

  • What do you know for certain? Observable facts, not assumptions
  • What are you assuming? "This library should work this way" - have you verified?
  • Strip away everything you think you know. Build understanding from observable facts.

Cognitive Biases to Avoid

Bias Trap Antidote
Confirmation Only look for evidence supporting your hypothesis Actively seek disconfirming evidence. "What would prove me wrong?"
Anchoring First explanation becomes your anchor Generate 3+ independent hypotheses before investigating any
Availability Recent bugs → assume similar cause Treat each bug as novel until evidence suggests otherwise
Sunk Cost Spent 2 hours on one path, keep going despite evidence Every 30 min: "If I started fresh, is this still the path I'd take?"

Systematic Investigation Disciplines

Change one variable: Make one change, test, observe, document, repeat. Multiple changes = no idea what mattered.

Complete reading: Read entire functions, not just "relevant" lines. Read imports, config, tests. Skimming misses crucial details.

Embrace not knowing: "I don't know why this fails" = good (now you can investigate). "It must be X" = dangerous (you've stopped thinking).

When to Restart

Consider starting over when:

  1. 2+ hours with no progress - You're likely tunnel-visioned
  2. 3+ "fixes" that didn't work - Your mental model is wrong
  3. You can't explain the current behavior - Don't add changes on top of confusion
  4. You're debugging the debugger - Something fundamental is wrong
  5. The fix works but you don't know why - This isn't fixed, this is luck

Restart protocol:

  1. Close all files and terminals
  2. Write down what you know for certain
  3. Write down what you've ruled out
  4. List new hypotheses (different from before)
  5. Begin again from Phase 1: Evidence Gathering