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claude-foundations/memory/log/2026-03-15.225345.md
Paul O'Reilly e94417b896 Add best practices, hooks, memory files, and scripts from recent sessions
Includes: spec-driven and test-driven development best practices,
reproduce-before-fixing debugging workflow, require-plan-file hook,
find-project-root script, session logs, memory files for decisions/
gotchas/process-lessons, and updates to existing best practice topics.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-17 09:47:47 +13:00

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# Session Log — 2026-03-15
## Summary
Fixed the `/distill-best-practices` skill which was broken due to hardcoded and relative paths in `!`command`` blocks. Replaced all paths with `CLAUDE_PROJECT_ROOT` env var for portability, added a `find-project-root` helper script, and updated `settings.yaml` to use relative paths. Also fixed the same relative-path issue in `/log` and `/reflect-logs` skills.
## Decisions
- Decision: Use `CLAUDE_PROJECT_ROOT` env var for all cross-project path resolution in skills — Rationale: Makes skills shareable with colleagues; hardcoded `~/dev/claude/` paths are user-specific and relative `../` paths break depending on CWD
- Decision: Add Step 0 (detect project root) as runtime fallback in distill skill — Rationale: Skills should degrade gracefully if env var isn't set; Claude can walk up the directory tree to find highest CLAUDE.md
- Decision: `settings.yaml` paths relative to CLAUDE_PROJECT_ROOT, not absolute — Rationale: Portability; `projects_dir: projects` instead of `~/dev/claude/projects`
- Decision: Added `extra_projects` section to settings.yaml for projects outside `projects_dir` — Rationale: `small-scripts` lives at root level, not under `projects/`
## Gotchas Discovered
- **[skills]** Symptom: `/distill-best-practices` failed with sandbox error — `cat ../claude-foundations/...` resolved to `/home/paul/dev/claude-foundations/` (outside sandbox) when CWD was `~/dev/claude/` — Fix: Replace all relative and hardcoded paths with `${CLAUDE_PROJECT_ROOT}` env var
- **[skills]** Symptom: `!`command`` blocks can't use `$()` command substitution — Fix: Use env var expansion (`${CLAUDE_PROJECT_ROOT}`) which works, and fall back to runtime detection in skill instructions
- **[skills]** Symptom: Claude Code Bash tool doesn't persist `export` across `;`-separated commands in the same invocation when the variable is used in file path arguments — Fix: Use `bash -c '...'` wrapper or ensure var is in shell profile
## Key Context
- `settings.yaml` now tracks 6 projects under `distill.projects` plus `small-scripts` under `extra_projects`
- Added projects: `agent-runtimes`, `claude-foundations`, `cluster-apps/octopus-deploy`, `hugo-accelerator`
- `find-project-root` script created at `claude-foundations/scripts/find-project-root` — walks up from CWD to find highest CLAUDE.md
- `CLAUDE_PROJECT_ROOT` export added to `~/.bashrc`
- Three skills updated: `distill-best-practices` (full rewrite of paths), `log` and `reflect-logs` (settings fallback path)