Individual skill
session-source-fork
Use when authoring a rig spec member or `rig expand` payload that needs to start a new managed seat from a prior runtime conversation source — `session_source: { mode: fork, ref: { kind, value } }`. v1 supports `mode: fork` with `ref.kind: native_id` for Claude and Codex. The new seat persists a NEW post-fork token; the parent token is NEVER written onto the new seat. NOT for restoring an existing seat or for artifact-backed mental-model rebuild.
skills/_canonical/core/session-source-fork/SKILL.md
Source commit 344815052870e4b1be2486350ba52a8d1c6afeb2
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- Last checked
- Nov 5, 2026
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- Apache-2.0
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- agent-harness Repository topic
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# session_source Fork
`session_source` is a **member-level OpenRig field** that declares how a
newly-launched managed seat should derive its initial conversation
continuity from a prior runtime conversation source.
v1 supports one mode: **`fork`** — start a *new* managed seat from a
prior native runtime conversation source without claiming the original
seat continued.
The schema is runtime-neutral; implementation is runtime-specific (Claude
and Codex have their own native fork commands).
## Use this when