Use the full bootstrap execution graph. Phase 2 sanity opens three parallel branches: six LLVM/Cranelift subsystem test binaries, Phase 3, and early Phase 4 from Phase 2. Phase 3 sanity opens whole tools/library tests and Phase 4 from Phase 3. Test both Phase 4 cohorts. The selected 80-job code-generation budget must…
Use when: Actively debugging a running session with breakpoints and LSP-enriched inspection. For log-based debugging (env vars, IR export, bug database), use the debug agent instead. Skills: /debug-lsp, /debug Mandatory step order + host-verified commands: .claude/skills/lib/debugladder.md.
Use when: Finding files, understanding code structure, tracing dependencies, answering "where is X?" or "how does X work?" Skills: /research, /architecture.
Use when: RSS is too high or climbing, an OOM/kill, a heap-growth or leak suspicion, or an object that reads back wrong (corrupt aggregate). Related: perf.md (time), debug.md (correctness), build.md.
Use when: Something got slower, a build/lint/test exceeds its budget, a hot path needs a cost model, or a perf gate went red. Related: debug.md (correctness first), mem.md (RSS/heap), build.md.
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