Session Start Skill

Session Start Skill

Project-instruction file resolution: CLAUDE.md and AGENTS.md (Codex CLI) are transparent aliases — see skills/_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.

Then set the output level. Read ~/.config/session-orchestrator/owner.yaml and take efficiency.output-level (lite | full | ultra), efficiency.preamble, and tone.style. If the file is missing, unreadable, or a key is absent, use the defaults full / minimal / neutral. Apply the matching ### output-level: <value> block from soul.md § Output Levels for the whole session — its line budgets are binding, not advisory, and § "Never traded for brevity" names what they may never cut.

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.

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-worktree detection is broader than acquire()'s single-worktree check. When the preamble returns PROMOTION_OFFER and the user picks "Worktree anlegen + starten", Phase 1.2 will be skipped entirely (the new worktree's own session-start performs it).

Outcome handling:

• PASS_THROUGH → continue to Phase 1
• EXCLUSIVE_BLOCKED → exit Phase 0 cleanly per the AUQ outcome (Warten / Andere Session beenden / Abbrechen — all three return without initializing STATE.md)
• PROMOTION_OFFER with user picking "Worktree anlegen + starten" → call enterWorktree({ basePath, sessionId, branch, repoRoot }) from scripts/lib/autopilot/worktree-pipeline.mjs. Compute params: basePath = path.dirname(repoRoot), sessionId from resolveSemanticSessionId(), branch from current HEAD, repoRoot = process.cwd(). On success, exit Phase 0 immediately — the new worktree's own session-start runs from scratch (Phase 1 onwards), Phase 1.2 session-lock-acquire is the new worktree's responsibility. On enterWorktree failure (WorktreeBoundaryError or git worktree add non-zero exit), emit stderr WARN parallel-aware: enterWorktree failed: <err>; falling back to Manuell and proceed via the Manuell path.
• PROMOTION_OFFER with user picking "Manuell — in-place daneben" → append Deviation, continue to Phase 1
• PROMOTION_OFFER with user picking "Abbrechen" → exit cleanly

Implementation reference: skills/_shared/parallel-aware-preamble.md § Implementation. AUQ reference: skills/_shared/parallel-aware-auq.md.

Phase 1: Read Session Config

Read and parse Session Config per skills/_shared/config-reading.md. Store result as $CONFIG.