0.5.0

TLDR

Unified 7-stage modular pipeline replaces the monolithic upstream handler with extract → routing → headers → thinking → forward → transform → response stages. Subagent session affinity via CC hooks and AC markers routes each subagent to a pinned backend across its lifetime. Teammate pipeline with /teammate/{agent_id} URL-path routing and synchronous tmux shim registration enables per-agent backend selection for Agent Teams. Session token handshake via ANTHROPIC_CUSTOM_HEADERS secures proxy traffic. Per-session log file isolation prevents multi-instance log corruption. Ctrl+R restarts Claude Code while preserving the session via --resume. Dev builds are stamped with git hash and expose --version.

Breaking Changes

Config: [agent_teams] renamed to [agents] — if you have [agent_teams] in your config, rename it to [agents]. The teammate_backend field is unchanged. New optional field subagent_backend added for subagent routing.

# Before (0.4.0)
[agent_teams]
teammate_backend = "glm"

# After (0.5.0)
[agents]
teammate_backend = "glm"
subagent_backend = "glm"  # optional, new

Features

• Unified 7-stage pipeline — modular extract/routing/headers/thinking/forward/transform/response stages behind clean interfaces (0142708)
• Subagent session affinity — CC hooks register subagents in a shared registry, AC markers (⟨AC:{id}⟩) route requests to pinned backends (dadbddc, 8f019e5)
• Teammate pipeline — /teammate/{agent_id}/* URL-path routing with TeammateMarker extension, always-strip path semantics (52ff649)
• Tmux shim teammate injection — detects --agent-id, registers via /api/teammate-start, rewrites ANTHROPIC_BASE_URL per-teammate (52ff649)
• Session token auth — handshake via ANTHROPIC_CUSTOM_HEADERS, hook endpoints exempt from auth (d01cf79, e1b8c9b)
• Subagent backend UI — backend selection popup and runtime toggle for subagent routing (44a4478, 64e36bf)
• Per-session log isolation — per-instance log file names, old log cleanup on startup (ee5fd00, 988dd53)
• Dev build versioning — git hash stamp, --version flag (a9a94ac)

Bug Fixes

• Skip AC marker parsing when subagent registry is empty (3d80718)
• Detect teammate spawns by --agent-id flag instead of binary path (ab02d03)
• Inject shim PATH into initial spawn env (a0f7c10)
• Disable session token check for teammate pipeline (3878f47)
• Update spawn env with actual proxy port after try_bind() (9fc2b0d)
• Resolve 3 critical pipeline bugs found in review (20cea7c)
• Use append mode instead of truncate for log files (f63adb7)
• Ctrl+R now resumes current session via --resume (668a8ec)
• --continue now uses --resume for existing sessions (cb0b4bf)
• Replace fragile sed with bash regex in tmux shim (127b121)
• Patch dependency vulnerabilities and optimize release profile (1735bc5)
• Always set CLAUDE_CODE_SUBAGENT_MODEL env var (18dd02b)
• Update stale shim tests to match current injection logic (7ac8682)

Refactor

• Remove legacy pipeline and unified-pipeline feature flag (aa32d37)
• Rename SubagentBackend/SubagentRegistry → AgentBackendState/AgentRegistry for unified agent routing (52ff649)
• Harden AC marker parsing against false positives (82e4409)
• Use agent_id instead of session_id for subagent routing (d4f4088)
• Remove CLAUDE_CODE_SUBAGENT_MODEL in favor of AC marker routing (7901db3)
• Rename AgentTeamsConfig → AgentsConfig (a61e1b9)
• Add SAFETY comments, reduce cloning, deduplicate formatting (dfe3b47)

Testing

• Pipeline integration tests — 7-stage pipeline end-to-end (pipeline_integration.rs)
• Pipeline stage unit tests — per-stage isolation (pipeline_stages.rs)
• Subagent session affinity tests (subagent_session_affinity.rs)
• Session token auth tests (session_token_auth.rs)
• Spawn env corner case tests (spawn_env_corner_cases.rs)
• Ctrl+R restart tests (restart_claude.rs)
• Shim detection and injection tests (shim.rs)