chore(voyage): release v5.6.1 — one-line descriptions for reference/dormant agents (~700 tok trim)

Trim the always-loaded token cost of the agent listing Claude Code injects
into every session. The three *-orchestrator reference docs
(planning/research/review) and the dormant synthesis-agent carried
multi-paragraph description: frontmatter (full rationale + CC-2.1.172
history + a usage example) despite never being spawnable from the live
/trek* pipeline; their description is now a single line, with the full
rationale already living — and remaining — in each file's body. ~700
tokens trimmed, no behavior change.

The three orchestrators retain the self-declaration "reference document,
not a spawnable capability" (doc-consistency pin); synthesis-agent retains
its DORMANT / not-wired flag + docs/T1-synthesis-poc-results.md pointer.
Bump plugin.json, package.json, package-lock.json, and the README badge to
5.6.1; prepend CHANGELOG v5.6.1 entry + README What's-new note. Surfaced
via config-audit always-loaded token-audit dogfooding.

Additive — no breaking change, no runtime behavior change. Canonical
node --test: 739 pass, 0 fail (2 skipped); version-consistency + agent
inventory + frontmatter pins green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CrTb8ktf1XZWEVwgz5MTTo

agents/planning-orchestrator.md

@@ -1,18 +1,6 @@
 ---
 name: planning-orchestrator
-description: |
-  Inline reference (v2.4.0) — documents the planning workflow that
-  /trekplan executes in main context.
-  This file is a reference document, not a spawnable capability.
-  Historically not spawned as a sub-agent: before Claude Code 2.1.172
-  the harness did not expose the
-  Agent tool to sub-agents, so a background orchestrator could not spawn
-  the exploration swarm (architecture-mapper, task-finder, plan-critic,
-  etc.). As of CC 2.1.172 sub-agents can spawn sub-agents (up to 5 levels
-  deep), so a delegated-orchestration redesign is under evaluation (see
-  docs/cc-upgrade-2.1.181-decision-matrix.md, W1/CC-26). Until then the
-  /trekplan command orchestrates the phases below directly in the main
-  session.
+description: Reference document, not a spawnable capability — documents the /trekplan planning workflow that runs inline in main context (full rationale, CC-2.1.172 history, and phase map in body).
 model: opus
 color: cyan
 tools: ["Read", "Glob", "Grep", "Write", "Edit", "Bash", "TaskCreate", "TaskUpdate"]

agents/research-orchestrator.md

@@ -1,17 +1,6 @@
 ---
 name: research-orchestrator
-description: |
-  Inline reference (v2.4.0) — documents the research workflow that
-  /trekresearch executes in main context.
-  This file is a reference document, not a spawnable capability.
-  Historically not spawned as a sub-agent: before Claude Code 2.1.172
-  the harness did not expose the
-  Agent tool to sub-agents, so a background orchestrator could not spawn
-  the research swarm. As of CC 2.1.172 sub-agents can spawn sub-agents
-  (up to 5 levels deep), so a delegated-orchestration redesign is under
-  evaluation (see docs/cc-upgrade-2.1.181-decision-matrix.md, W1/CC-26).
-  Until then the /trekresearch command orchestrates the phases below
-  directly in the main session.
+description: Reference document, not a spawnable capability — documents the /trekresearch workflow that runs inline in main context (full rationale, CC-2.1.172 history, and phase map in body).
 model: opus
 color: cyan
 tools: ["Read", "Glob", "Grep", "Write", "Edit", "Bash"]

agents/review-orchestrator.md

@@ -1,19 +1,6 @@
 ---
 name: review-orchestrator
-description: |
-  Inline reference (v3.2.0) — documents the review workflow that
-  /trekreview executes in main context.
-  This file is a reference document, not a spawnable capability.
-  Historically not spawned as a sub-agent: before Claude Code 2.1.172
-  the harness did not expose
-  the Agent tool to sub-agents, so a background orchestrator could not
-  spawn the reviewer swarm (brief-conformance-reviewer,
-  code-correctness-reviewer, review-coordinator). As of CC 2.1.172
-  sub-agents can spawn sub-agents (up to 5 levels deep), so a
-  delegated-orchestration redesign is under evaluation (see
-  docs/cc-upgrade-2.1.181-decision-matrix.md, W1/CC-26). Until then the
-  /trekreview command orchestrates the phases below directly in the main
-  session.
+description: Reference document, not a spawnable capability — documents the /trekreview workflow that runs inline in main context (full rationale, CC-2.1.172 history, and phase map in body).
 model: opus
 color: red
 tools: ["Read", "Glob", "Grep", "Write", "Edit", "Bash", "TaskCreate", "TaskUpdate"]

agents/synthesis-agent.md

@@ -1,28 +1,6 @@
 ---
 name: synthesis-agent
-description: |
-  Synthesises the trekplan Phase-5/7 exploration outputs (architecture-mapper,
-  dependency-tracer, task-finder, risk-assessor, test-strategist, git-historian,
-  convention-scanner, research) into the structured findings DIGEST that Phase 7
-  currently builds inline. Reads the outputs from disk and returns a single
-  schema-conformant digest — it never spawns sub-agents and never writes files.
-
-  STATUS — DORMANT (NW3 / S12). Built and measured as the CC-26 §6 synthesis-agent
-  PoC, then DECLINED per measurement: delegating only Phase 7 yields Δ main-context
-  ≈ 0 because the Phase-5 swarm runs foreground, so its outputs are already resident
-  in main before synthesis. This agent is therefore NOT wired into /trekplan. It is
-  kept as a documented, schema-conformant building block so a future Phase-5
-  redesign (swarm-writes-to-disk / nested orchestrator) can be re-measured cheaply.
-  See docs/T1-synthesis-poc-results.md and docs/T1-cc26-delegated-orchestration.md §6.
-
-  <example>
-  Context: A future Phase-5-writes-to-disk redesign wants to re-test delegated synthesis.
-  user: "Synthesise the exploration outputs in .claude/projects/X/exploration/ into a digest"
-  assistant: "Launching synthesis-agent to read those outputs and return a findings digest."
-  <commentary>
-  Only reachable deliberately (PoC / future re-measurement) — not from the live pipeline.
-  </commentary>
-  </example>
+description: DORMANT PoC (NW3/S12), NOT wired into /trekplan — a schema-conformant agent that distills the Phase-5/7 exploration outputs into one findings digest; kept as a re-measurable building block (see docs/T1-synthesis-poc-results.md).
 model: opus
 color: cyan
 tools: ["Read", "Glob", "Grep"]