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Merge remote-tracking branch 'origin/master' into codex/trim-ai-prose

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# Conflicts:
#	docs/config-catalog.md
#	docs/cordis-catalog/services.md
#	docs/rfc/proposed/feature/2026-07-08-interactive-side-sessions.md
#	docs/rfc/proposed/simplification/2026-06-20-unify-agent-and-session-id.md
#	examples/coding-agent/tests/keyless-smoke.e2e.ts
#	packages/ui/acp/src/index.ts
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Tianyi Cui
2026-07-13 23:44:44 +08:00
parent 148046b9c8 62eba83f4f
commit 20402b637c
22 changed files with 153 additions and 103 deletions
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docs/rfc/proposed/feature/2026-07-08-interactive-side-sessions.md
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@@ -10,12 +10,12 @@ A user may want to explore a question from a live session without changing its m
A **side session** is an ordinary live session forked at the source's last completed turn, attached to its own agent, framed as a read-only advisor, and able to **merge back** one condensed note.
- **Fork and attach:** create the child with the parent's balanced completed-turn prefix and stamp `parentSession` and `seedLength`. This composes `ctx.agents.create({ seed, meta })`; it adds no core service or session-store method.
- **Advisor framing:** inject one plugin-sourced `context/message` after creation. Keeping the system prompt byte-identical preserves the provider prefix cache.
- **Fork and attach:** create the child with the parent's balanced completed-turn prefix and stamp `parentSession` and `seedLength` in its metadata. This composes `ctx.agents.create({ seed, meta })`; it adds no core service or session-store method.
- **Advisor framing:** inject one plugin-sourced `context/message` after creation that tells the child to explain without mutating or continuing the task. Keeping the system prompt byte-identical preserves the provider prefix cache over inherited history.
- **Merge-back:** ask the child for a length-capped handback, then inject one plugin-sourced `context/message` into the parent. The next parent request sees it at its logged position, preserving replay and [request reconstructability](../../implemented/architecture/2026-07-05-reconstructable-requests.md) without a new session event.
- **Presentation:** invocation, session switching, and handback rendering belong to the first client-owned surface. This RFC specifies only the surface-independent mechanics.
Rewind productization, session-tree views, a model-facing side-session tool, and `forkName`/`mergedInto` metadata are out of scope. A live-adapter spike has validated source-log isolation, inherited context, a multi-turn child exchange, and merge-back visibility in the parent's next turn.
Rewind productization, session-tree views, a model-facing side-session tool, and `forkName`/`mergedInto` metadata are out of scope. A live-adapter spike validated source-log isolation, inherited context, a multi-turn child exchange, and merge-back visibility in the parent's next turn.
## Alternatives considered
@@ -27,7 +27,7 @@ Rewind productization, session-tree views, a model-facing side-session tool, and
## Acceptance criteria
- Forking leaves the source untouched and creates a child with the balanced completed-turn prefix, `parentSession`, `seedLength`, and a byte-identical system prompt.
- Advisor framing adds exactly one plugin-sourced `context/message` at the head of the child's appended history.
- Advisor framing adds exactly one plugin-sourced `context/message` at the head of the child's appended history, rather than changing its system prompt.
- Merge-back adds exactly one length-capped `context/message` with source `plugin: sidechat`; the next parent request and replay see it at the same position.
- Parent and child run concurrently without log or stream cross-talk.
- Unit tests cover fork/attach and merge-back; snapshot coverage lands with the first bound surface.