* fix(orchestrator): prevent LLM from dispatching orchestrator as subagent

The start-orchestrator skill lacked an explicit role-assumption declaration,
causing LLMs to default to activating orchestrator via agent-dispatch (the
same path used for all other agents). Added a prominent §角色假设 section
and Anti-Patterns to SKILL.md, and replaced the misleading maxTurns: 200
field in AGENT.md with a comment clarifying that orchestrator runs in the
main thread and is never spawned via agent-dispatch.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* chore: bump version to 0.1.5

* fix(agile-modes): relax document length limits to match real-world project sizes

Previous hard limits (prd-lite/arch-lite/dev-plan-lite ≤50 lines,
brief ≤150 lines) were too tight to hold content for even a 5-feature
agile-lite project after accounting for template structure overhead (~20
lines). This caused mode escalation to trigger prematurely on any
realistic project.

Changes:
- lite templates: ≤50 → target ≤100, escalate at 150 (soft)
- brief template: ≤150 → target ≤200, escalate at 300 (soft)
- agile-lite task count escalation: >15 → >25
- agile-lite scope description: "5-10 feature" → "5-20 feature"
- escalation trigger now also checks content quality, not just line count
- All changes mirrored in src/ scaffold

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* chore: bump version to 0.1.6

---------

Co-authored-by: huancheng.lin@foxmail.com <huancheng.lin@foxmail.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>