v0.5.0-beta.17

Beta.17 updates generated templates and platform integrations for built-in Trellis metadata, Pi subagents, and task context wiring.

Enhancements

Bundled `trellis-meta` skill

trellis-meta is now installed through the built-in skill template pipeline instead of requiring a separate marketplace install.

Area	beta.17 behavior
Template source	`packages/cli/src/templates/common/bundled-skills/trellis-meta/`
Template reader	`getBundledSkillTemplates()` reads complete skill directories
Template resolver	`resolveBundledSkills()` resolves placeholders across `SKILL.md` and `references/**`
Template writer	`writeSkills()` writes workflow skills plus bundled multi-file skills
Template tracking	`collectSkillTemplates()` includes every bundled skill file for update hash tracking

Every platform skill root now receives trellis-meta/SKILL.md plus its reference files during trellis init and trellis update.

Pi subagent launcher and config

The generated Pi extension now launches nested Pi subagents through a Windows-safe process path and supports per-agent model settings.

Capability	beta.17 behavior
CLI resolution	Resolves `@mariozechner/pi-coding-agent/dist/cli.js` and runs it with `process.execPath` when available
Fallback	Uses `spawn("pi", ...)` when no JS entrypoint is found
Prompt transport	Sends delegated prompts through stdin instead of argv
Output mode	Runs child Pi with `--mode text -p --no-session`
Context	Forwards `TRELLIS_CONTEXT_ID` into child processes
Cancellation	Wires `AbortSignal` to child process kill/reject behavior
Output bounds	Keeps bounded stdout/stderr buffers with truncation notices

Subagent run configuration can come from .pi/agents/*.md frontmatter or per-call tool input:

---
model: anthropic/claude-sonnet-4
thinking: high
fallbackModels:
  - openai/gpt-5-mini
---

The extension maps those fields to Pi CLI args:

Input	Child Pi args
`model` + `thinking`	`--model <model>:<thinking>` unless the model already has a thinking suffix
`model` only	`--model <model>`
`thinking` only	`--thinking <level>`

Pi still keeps Trellis workflow skills under .pi/skills. Shared .agents/skills remains deferred until the shared skill text is platform-neutral.

Workflow task slug wording

The Trellis brainstorm instructions now state that task.py create --slug <auto> receives a slug without a date prefix. task.py create adds the MM-DD- directory prefix automatically, so command examples no longer imply that callers should include the date in --slug.

Behavior Changes

Init completion output

trellis init no longer prints the promotional completion block. The init completion path now stays focused on generated files, next actions, and testable onboarding output. Integration coverage asserts that the removed promotional pain-point copy does not return.

Bug Fixes

Subagent context wiring

Generated and dogfood platform files now preserve subagent context more consistently across host-specific payload formats.

Host / file	beta.17 behavior
`.claude/hooks/inject-subagent-context.py`	Parses Cursor-style custom subagent payloads such as `{ custom: { name } }` and `{ type: { case: "custom", value: { name } } }`
`.claude/hooks/inject-workflow-state.py` / `.codex/hooks/inject-workflow-state.py`	Workflow-state breadcrumbs require exact `trellis-implement`, `trellis-check`, or `trellis-research` agent names
`.cursor/hooks/session-start.py`	Persists `TRELLIS_CONTEXT_ID` through `CLAUDE_ENV_FILE` for later Bash commands when that bridge is available
`AGENTS.md` template	Documents that subagents must complete before yielding and when to spawn them

These changes keep implement.jsonl and check.jsonl context loading tied to the Trellis agent names that receive injected task context.

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Existing projects:

trellis update

No --migrate flag is required for this beta.

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Enhancements

Bundled `trellis-meta` skill

Pi subagent launcher and config

Workflow task slug wording

Behavior Changes

Init completion output

Bug Fixes

Subagent context wiring

Upgrade

​Enhancements

​Bundled trellis-meta skill

​Pi subagent launcher and config

​Workflow task slug wording

​Behavior Changes

​Init completion output

​Bug Fixes

​Subagent context wiring

​Upgrade

Enhancements

Bundled `trellis-meta` skill

Pi subagent launcher and config

Workflow task slug wording

Behavior Changes

Init completion output

Bug Fixes

Subagent context wiring

Upgrade