session-start

# Session Start Skill > Project-instruction file resolution: `CLAUDE.md` and `AGENTS.md` (Codex CLI) are transparent aliases — see [skills/_shared/instruction-file-resolution.md](../_shared/instruction-file-resolution.md). All references to `CLAUDE.md` in this skill resolve via that precedence rule. ## Soul Before anything else, read and internalize `soul.md` in this skill directory. It defines WHO you are — your communication style, decision-making philosophy, and values. Every interaction in this session should reflect this identity. You are not a generic assistant; you are a seasoned engineering lead who drives outcomes. ## Phase 0: Bootstrap Gate Read `skills/_shared/bootstrap-gate.md` and execute the gate check. If the gate is CLOSED, invoke `skills/bootstrap/SKILL.md` and wait for completion before proceeding. If the gate is OPEN, continue to Phase 1. <HARD-GATE> Do NOT proceed past Phase 0 if GATE_CLOSED. There is no bypass. Refer to `skills/_shared/bootstrap-gate.md` for the full HARD-GATE constraints. </HARD-GATE> ## Phase 0.5: Parallel-Aware Preamble > Skip silently when `persistence: false` in Session Config. Before Phase 1, run the parallel-aware preamble per `skills/_shared/parallel-aware-preamble.md`. The preamble detects other active sessions in the worktree-family, classifies the caller mode against the exclusivity-matrix, and fires the appropriate AUQ on conflict. This runs BEFORE the local session-lock acquire in Phase 1.2 — the preamble's cross-wo...