Merge remote-tracking branch 'origin/master' into codex/invariant-service-seam

# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-19-package-owned-invariant-service.i18n.yaml
#	.agents/notes/implemented/architecture/2026-07-19-package-owned-invariant-service.md
#	.agents/notes/implemented/architecture/2026-07-19-package-owned-invariant-service.zh.md
#	.agents/notes/implemented/feature/2026-06-18-compaction-capability-seam.md
#	.agents/notes/implemented/feature/2026-07-07-session-prefix.md
#	.agents/notes/implemented/process/2026-07-14-typescript-program-backed-semantic-gates.i18n.yaml
#	docs/architecture.md
#	docs/config-catalog.md
#	docs/core-data-structures/session.md
#	docs/rfc/INDEX.md
#	packages/examples/agent-spine-demo/README.md
#	packages/examples/agent-spine-demo/src/index.ts
#	packages/examples/agent-spine-demo/tests/agent-core.spec.ts
#	packages/support/invariants/README.md
#	packages/support/invariants/src/index.ts
#	packages/support/invariants/tests/invariants.spec.ts
This commit is contained in:
Tianyi Cui
2026-07-20 00:25:31 +08:00
676 changed files with 6946 additions and 2405 deletions

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@@ -27,15 +27,31 @@ See [`dsh-subagent-spawn`](../subagent-spawn/README.md) for the run lifecycle, m
### Child-agent history and envelope
**What the model sees**: The child receives the parent's balanced completed-turn surface prefix, then the new task content verbatim. A configured persona shadows prompt text in the child's fresh scope; a tool restriction filters its global wire schemas, executable lookup, and Code Mode SDK bindings but not standalone guidance. The parent's tool view and authority are not inherited. An optional structured-output request adds its child-only contract. The parent's current in-flight turn is excluded.
#### What the model sees
**Token effect**: Forking duplicates retained completed history into separate child requests; the child then accumulates its own tokens independently. Persona changes repeated prompt cost, filtering changes schema or generated SDK cost, and a first-turn fork has no inherited history.
The child receives the parent's balanced completed-turn surface prefix, then the new task content verbatim. A configured persona shadows prompt text in the child's fresh scope; a tool restriction filters its global wire schemas, executable lookup, and Code Mode SDK bindings but not standalone guidance. The parent's tool view and authority are not inherited. An optional structured-output request adds its child-only contract. The parent's current in-flight turn is excluded.
#### Token effect
Forking duplicates retained completed history into separate child requests; the child then accumulates its own tokens independently. Persona changes repeated prompt cost, filtering changes schema or generated SDK cost, and a first-turn fork has no inherited history.
#### KV Cache effect
The child may reuse the inherited byte-identical prefix under the same provider and model. Persona, tool-filter, generated-SDK, or route changes may invalidate reuse before inherited history; later child history is append-only.
### Parent tool result, indirectly
**What the model sees**: The parent receives only the child's own final output through `dsh-tool-subagent`, not the inherited prefix or intermediate work.
#### What the model sees
**Token effect**: Parent input grows by one data-dependent final result retained until compaction.
The parent receives only the child's own final output through `dsh-tool-subagent`, not the inherited prefix or intermediate work.
#### Token effect
Parent input grows by one data-dependent final result retained until compaction.
#### KV Cache effect
Append-only; newly visible content follows the reusable request prefix and does not invalidate existing KV-cache entries.
## Known Limitations and Deferred Work