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projects/dotfiles/050-pi-subagents-fork-context-task.md

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+---
+status: open
+parent: "[[027-pi-subagents-implementation-spec-task]]"
+blocked-by:
+  - "[[046-pi-subagents-minimal-tracer-bullet-task]]"
+tags:
+  - ticket/task/afk
+---
+
+# Implement fork context mode
+
+## Question
+
+Add fork context mode so a spawn can give the worker the parent active-branch transcript snapshot and delegated-role wrapper while independent context remains clean by default.
+
+## What to build
+
+Implement the second version-one context mode.
+A forked worker should start from the active branch session snapshot and receive a small delegated-role wrapper with the per-call prompt.
+Independent workers should remain transcript-clean.
+Named agents that declare `allowedContexts` should reject disallowed spawn overrides.
+
+## Acceptance criteria
+
+- [ ] `fork` serializes the parent session header and active branch entries into a child-startable session.
+- [ ] The forked worker receives the parent active-branch context plus the delegated request wrapper.
+- [ ] `independent` workers still do not receive parent transcript context.
+- [ ] `allowedContexts` rejects disallowed context overrides.
+- [ ] Tests or manual checks distinguish forked and independent context visibility.
+
+## Implementation Notes
+
+Do not summarize, strip tool output, or compact before spawning.
+Let child Pi handle normal compaction.