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Adds trellis upgrade and carries stable-line context fixes into the 0.6 beta track.

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Enhancements

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Trellis Upgrade

trellis upgrade installs the npm channel that matches the current CLI version.
CommandBehavior
trellis upgradeInstalls @mindfoldhq/trellis@latest, @beta, or @rc by channel.
trellis upgrade --tag <tag>Installs an explicit dist-tag or version.
trellis upgrade --dry-runPrints the npm command without installing.
Update hints now point at trellis upgrade instead of raw npm install -g commands.

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Brainstorm Templates

Bundled brainstorm instructions are shorter and match the beta.8 planning artifact flow.
TemplateChange
packages/cli/src/templates/codex/skills/brainstorm/SKILL.mdUses the shorter brainstorm routing model.
packages/cli/src/templates/common/skills/brainstorm.mdUses the same shared planning contract.
packages/cli/src/templates/copilot/prompts/brainstorm.prompt.mdMirrors the shorter prompt text.

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Bug Fixes

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Upgrade Execution

The upgrade command validates tag/version input, avoids shell interpolation on POSIX, uses cmd.exe /d /s /c on Windows, and prints npm/PATH troubleshooting when installation fails.

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OpenCode Context Prefix

OpenCode now picks the TRELLIS_CONTEXT_ID prefix for the shell dialect that will parse the command.
EnvironmentPrefix format
Windows PowerShell$env:TRELLIS_CONTEXT_ID = ...
Windows Git Bash/MSYS/Cygwinexport TRELLIS_CONTEXT_ID=...
Existing env prefixenv TRELLIS_CONTEXT_ID=...

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Session Context

Non-Git Trellis roots no longer report fake clean Git state. Session context now states that the root is not a Git repository and scans bounded child repositories for unconfigured polyrepo layouts.

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OpenCode Sub-Agent Context

Trellis implement/check/research child sessions skip duplicate workflow-state injection and resolve the active task from session runtime, an Active task: prompt hint, or a single-session fallback. 
jsonl entries -> prd.md -> design.md if present -> implement.md if present

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Hook Timeouts And Copilot

Hook defaults now allow 30s for SessionStart and 15s for per-prompt workflow injection across hook-based platforms. Copilot SessionStart output no longer emits the stale systemMessage; it keeps hookSpecificOutput.additionalContext.

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Internal

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Manifest Continuity

The beta line restores 0.5.13.json so future beta manifest checks include the stable 0.5.13 release.

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Upgrade

npm install -g @mindfoldhq/trellis@beta
trellis update