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Patch release improving Pi and Codex sub-agent reliability, UTF-8 hook input, bounded polyrepo scans, and platform detection.

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Bug Fixes

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Pi sub-agent model and thinking

trellis_subagent now uses the invoking Pi session model when neither the call nor agent frontmatter selects a model. Explicit overrides keep their existing precedence, and the thinking option now accepts and preserves max (#494, #499).

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Codex channel failures and idle timeout

The Codex channel adapter now emits a channel error when a turn fails without a final answer, surfaces non-retryable app-server errors, and deduplicates paired failure notifications. The supervisor idle timer continues after done or error, so completed workers that remain idle are terminated normally (#495, #496).

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UTF-8 hook input

Standalone Python hooks now decode host-provided JSON from stdin as UTF-8 independently of the process locale. This covers sub-agent context injection, shell session context, and the optional Claude statusline on GBK and other non-UTF-8 hosts (#498).

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Bounded polyrepo Git scans

Automatic child-repository discovery stops after eight repositories and directs larger workspaces to explicit packages configuration. Best-effort Git status probes now use a two-second timeout without changing normal Git commands (#497).

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Trellis-owned platform detection

getConfiguredPlatforms() now detects installations from Trellis-owned template hashes intersected with each platform collector and private config directory. Shared .agents/skills files no longer create false positives during trellis init (#501).

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Internal

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Python 3.9 CI gate

CI now compiles every tracked .py file with Python 3.9, runs basedpyright, and triggers when Python files change. This enforces the documented minimum Python version before release (#502).

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