bug(session-manager): CLAUDECODE nesting env vars leak to child Claude Code processes — silent exit

[apex-skyner]

Problem

When OpenClaw dispatches Claude Code as a background agent via agent_launch, the child process inherits CLAUDECODE=1, CLAUDE_CODE_SESSION, and CLAUDE_CODE_ENTRYPOINT from the parent environment.

Claude Code checks for CLAUDECODE=1 as a nesting guard and silently exits without running the task. This gives a 0% success rate on all agent_launch calls with harness: "claude-code".

Root Cause

In src/session-manager.ts:

env: {
  ...process.env,  // <-- inherits CLAUDECODE=1, CLAUDE_CODE_SESSION, CLAUDE_CODE_ENTRYPOINT
  CI: 'true',
  TERM: 'dumb',
},

Fix

Strip the nesting markers from the child env:

env: {
  ...process.env,
  CI: 'true',
  TERM: 'dumb',
  // Strip Claude Code nesting markers to prevent silent exit in nested spawns
  CLAUDECODE: undefined,
  CLAUDE_CODE_SESSION: undefined,
  CLAUDE_CODE_ENTRYPOINT: undefined,
  CLAUDE_CODE_SKIP_TELEMETRY_CONFIRM: '1',
},

Related

• coding-agent skill: Claude Code dispatch fails silently due to CLAUDECODE nesting guard openclaw/openclaw#57858 (same root cause in the bundled coding-agent skill)