fix review findings: make the prune-seam RFC + index match the persistence-only shipped scope

The reviewer caught two pieces of both-seams drift left over after the bash
get()/list() removal was reverted to a persistence-only change.

- docs/rfc/README.md: rename the index row from "persistence and bash seams" to
  "Prune dead methods from the persistence seam" so it matches the RFC title and
  the actually-shipped scope (verify-rfc-classification only checks the path is
  indexed, so this prose slipped the gate).
- The implemented RFC body still read like the original both-seams proposal
  (the "Two capability seams" framing, a `### BashExecutor.get()/.list()` problem
  section, a bash removal bullet in the Proposal, and current-source links that
  imply bash get/list were removed). Rewrite the body into the durable
  decision-record form: Problem/Proposal/criteria/risks now describe only the
  persistence has()/delete() removal that shipped, and the bash reasoning (why
  get()/list() earn their keep — a ~35-line test-harness migration cost makes the
  test consumer a real consumer) is folded into the top decision note as
  "considered and deliberately kept", not as a shipped change. Drop the stale
  bash source-line refs; keep the persistence consumer links pointing at current
  code (agent-loop load, ACP session/list).

docs/rfc/README.md

@@ -95,7 +95,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r
 | [Drop the mutable session summary](implemented/simplification/2026-06-19-drop-mutable-session-summary.md) | 2026-06-19 |
 | [Drop unconsumed assembled LLM convenience surfaces](implemented/simplification/2026-06-20-drop-unconsumed-llm-assembled-surfaces.md) | 2026-06-20 |
 | [Drop the unconsumed `llm/adapter-change` event](implemented/simplification/2026-06-20-drop-unconsumed-llm-adapter-change-event.md) | 2026-06-20 |
-| [Prune dead methods from the persistence and bash seams](implemented/simplification/2026-06-20-prune-dead-seam-methods.md) | 2026-06-20 |
+| [Prune dead methods from the persistence seam](implemented/simplification/2026-06-20-prune-dead-seam-methods.md) | 2026-06-20 |
 
 ### Architecture
 

docs/rfc/implemented/simplification/2026-06-20-prune-dead-seam-methods.md

@@ -2,50 +2,41 @@
 
 Status: implemented (proposed and accepted 2026-06-20)
 
-> **Implementation note (scope narrowed from the original proposal).** This RFC proposed pruning dead methods from BOTH the persistence seam (`SessionPersistence.has()`/`.delete()`) and the bash seam (`BashExecutor.get()`/`.list()`). Only the **persistence** removal shipped. The bash `get()`/`.list()` removal was reverted before merge: each is a one-line accessor over the executor's already-tracked `tasks` map, and removing them forced `dsh-tool-bash`'s tests onto a ~35-line `onTaskDone`-based completion-tracking harness to replace the one-line `ctx.bash.get(id)` lookup — the migration cost dwarfed the surface removed. Per the [AGENTS.md "RFCs are proposals, not golden truth"](../../../../AGENTS.md) principle, that friction is evidence the method earns its keep (a test harness IS a consumer that programs against the seam), so `get()`/`list()` stay. The bash-seam analysis below is retained for the record but was NOT acted on; `BashTaskId`-branding those methods lands in the [branded-ids RFC](../../proposed/architecture/2026-06-20-branded-ids.md) instead. The persistence removal stands: `has()`/`delete()` had only contract-test callers and no test-ergonomics cost to remove.
+> **Decision (scope: persistence only).** The shipped change removes the two dead persistence methods `SessionPersistence.has()` and `.delete()`; the body below records that decision. The bash seam's `BashExecutor.get()`/`.list()` were **considered for the same treatment and deliberately kept**: each is a one-line accessor over the executor's already-tracked `tasks` map, and removing them would force `dsh-tool-bash`'s tests onto a ~35-line `onTaskDone`-based completion-tracking harness to replace the one-line `ctx.bash.get(id)` lookup — the migration cost dwarfs the surface removed. Per the [AGENTS.md "RFCs are proposals, not golden truth"](../../../../AGENTS.md) principle, that friction is evidence the method earns its keep: a test harness IS a consumer that programs against the seam, so `get()`/`list()` stay. (`BashTaskId`-branding those surviving methods is taken up by the [branded-ids RFC](../../proposed/architecture/2026-06-20-branded-ids.md).) The persistence removal carries no such cost: `has()`/`delete()` had only contract-test callers and no test-ergonomics consumer to migrate.
 
 ## Problem
 
-Two capability seams ([interface / implementation / consumer](../../implemented/architecture/2026-06-13-capability-seams.md)) carry abstract methods that no consumer calls. The seam exists to let implementations and consumers evolve independently — but a method no consumer programs against is not a seam, it is speculative surface every implementation must still implement and test.
+A capability seam ([interface / implementation / consumer](../../implemented/architecture/2026-06-13-capability-seams.md)) carries abstract methods that no consumer calls. The seam exists to let implementations and consumers evolve independently — but a method no consumer programs against is not a seam, it is speculative surface every implementation must still implement and test.
 
 ### `SessionPersistence.has()` and `.delete()`
 
-The abstract service declares four operations beyond create/append: `load`, `list`, `has`, `delete` ([packages/session-persistence/session-persistence/src/index.ts:142-151](../../../../packages/session-persistence/session-persistence/src/index.ts)). Production consumers of `ctx.sessionPersistence` use only two of them: the agent-loop resume path calls `load()` ([packages/core/agent-loop/src/index.ts:176-194](../../../../packages/core/agent-loop/src/index.ts)), and the ACP bridge calls `list()` for `session/list` ([packages/ui/acp/src/index.ts](../../../../packages/ui/acp/src/index.ts)). Grepping every `sessionPersistence.*` / `persistence.*` use across `packages/*/src` and `examples/` finds no `has(` and no `delete(` on the service. The `.has(`/`.delete(` calls in `packages/ui/acp/src/index.ts` are on the in-memory `SessionStore` and a local `Set` of loading ids, not persistence. The only callers of `has`/`delete` are the contract suites and per-backend specs.
+The abstract service declared its operations beyond create/append: `load`, `list`, `has`, `delete`. Production consumers of `ctx.sessionPersistence` use only two: the agent-loop resume path calls `load()` ([packages/core/agent-loop/src/index.ts:176](../../../../packages/core/agent-loop/src/index.ts)), and the ACP bridge calls `list()` for `session/list` ([packages/ui/acp/src/index.ts:494](../../../../packages/ui/acp/src/index.ts)). Grepping every `sessionPersistence.*` / `persistence.*` use across `packages/*/src` and `examples/` finds no `has(` and no `delete(` on the service. The `.has(`/`.delete(` calls in `packages/ui/acp/src/index.ts` are on the in-memory `SessionStore` and a local `Set` of loading ids, not persistence. The only callers of `has`/`delete` were the contract suites and per-backend specs.
 
-`has()` is not just unused — it is the most intricate branch in the shared coordinator: a tracked-vs-untracked dual-probe (`loadLive(id, cwd)` for a live-tracked session vs `loadStored(id)` for an untracked one) with a multi-line rationale ([packages/session-persistence/session-persistence/src/coordinator.ts:298-310](../../../../packages/session-persistence/session-persistence/src/coordinator.ts)). `delete()` drags the `deleteStored` backend hook ([coordinator.ts:99](../../../../packages/session-persistence/session-persistence/src/coordinator.ts), [coordinator.ts:313-319](../../../../packages/session-persistence/session-persistence/src/coordinator.ts)) that every backend must implement. This is the [drop-mutable-session-summary](../../implemented/simplification/2026-06-19-drop-mutable-session-summary.md) pattern: a contract test exercises both, but no shipping code asks "is this session persisted?" or removes one.
-
-### `BashExecutor.get()` and `.list()`
-
-The bash seam declares `get(id)` ("look up a background task by id") and `list()` ("all tracked background tasks") ([packages/bash/bash/src/index.ts:88-107](../../../../packages/bash/bash/src/index.ts)), both implemented by `LocalBashExecutor` ([packages/bash/bash-local/src/index.ts:179-191](../../../../packages/bash/bash-local/src/index.ts)). The sole production consumer — `dsh-tool-bash` — drives tasks via `ownerOf`, `onTaskDone`, `start`, `readOutput`, `kill`, `resolve`, `run`; it never calls `get`/`list` in shipping code, and there is no `bash_list` tool exposing a task roster to the model. So both are dead production seam surface. They are used by tests, more broadly than a single idiom: the bash seam/executor specs assert them directly ([packages/bash/bash/tests/service.spec.ts](../../../../packages/bash/bash/tests/service.spec.ts), [packages/bash/bash-local/tests/executor.spec.ts](../../../../packages/bash/bash-local/tests/executor.spec.ts) both call `get()`/`list()`), and several `dsh-tool-bash` tests reach through `ctx.bash.get(id)` to await a task's `done`, read its `status`, or inspect task fields ([packages/bash/tool-bash/tests/tools.spec.ts](../../../../packages/bash/tool-bash/tests/tools.spec.ts), [packages/bash/tool-bash/tests/integration.spec.ts](../../../../packages/bash/tool-bash/tests/integration.spec.ts)). These are test-harness conveniences, not shipping consumers — but they are real test code an implementing PR must migrate or delete.
+`has()` was not just unused — it was the most intricate branch in the shared coordinator: a tracked-vs-untracked dual-probe (`loadLive(id, cwd)` for a live-tracked session vs `loadStored(id)` for an untracked one) with a multi-line rationale. `delete()` dragged the `deleteStored` backend hook that every backend had to implement. This is the [drop-mutable-session-summary](../../implemented/simplification/2026-06-19-drop-mutable-session-summary.md) pattern: a contract test exercised both, but no shipping code asks "is this session persisted?" or removes one.
 
 ## Proposal
 
 Remove the methods nothing consumes, from the abstract seam, the implementation, and the contract/spec suites that exist only to exercise them:
 
-- `SessionPersistence.has()` / `.delete()`: delete the abstract declarations, the coordinator's `has`/`delete`/`deleteCore`, and the `PersistenceBackend.deleteStored` hook. Remove the `has`/`delete` rows from the contract suite and the per-backend specs (jsonl + sqlite each implement `deleteStored` only to satisfy the hook — that implementation goes too). The backends are the [dual-backend](../../implemented/architecture/2026-06-14-session-persistence.md) design and otherwise out of scope, but removing a hook they implement for no consumer is part of removing the hook, not a backend redesign.
-- `BashExecutor.get()` / `.list()`: delete the abstract declarations and the `LocalBashExecutor` impls. The seam/executor specs that assert `get()`/`list()` directly (`bash/tests/service.spec.ts`, `bash-local/tests/executor.spec.ts`) lose those assertions (the behavior is being removed). The `dsh-tool-bash` tests that reach through `ctx.bash.get(id)` to await `done`, read `status`, or inspect task fields switch to the public completion/status seam they should use — `onTaskDone` (or the `done` promise and status the `start()` return already exposes) — keeping their coverage without the removed lookup method.
-- Update every doc and source-comment reference to the removed methods — not only literal `has(`/`delete(`/`get(`/`list(`/`deleteStored` call spellings, but also `{@link has}`/`{@link delete}` JSDoc links and prose that counts the methods (removing 2 of the persistence service's 6 public methods makes any "six public methods" phrasing wrong). The implementing PR greps `has`/`delete`/`get`/`list`/`deleteStored`/`{@link `/`six ` across `docs/`, `packages/*/README.md`, and source comments, and fixes each. The known doc sites: the seam READMEs ([packages/session-persistence/session-persistence/README.md](../../../../packages/session-persistence/session-persistence/README.md)'s `has(id)`/`delete(id)` API row and its "delegates its six public service methods" prose → four, [packages/bash/bash/README.md](../../../../packages/bash/bash/README.md)'s `get(id)`/`list()` row), the backend READMEs that describe `has`/`list` semantics ([packages/session-persistence/session-persistence-sqlite/README.md](../../../../packages/session-persistence/session-persistence-sqlite/README.md), [packages/session-persistence/session-persistence-jsonl/README.md](../../../../packages/session-persistence/session-persistence-jsonl/README.md) — reword "absent from `has()`/`list()`" to just `list()`), the service-map / seam docs in [docs/architecture.md](../../../architecture.md), and the persistence prose in the [session-persistence RFC](../../implemented/architecture/2026-06-14-session-persistence.md) and [shared write-coordinator RFC](../../implemented/architecture/2026-06-18-shared-persistence-write-coordinator.md). The known source-comment sites: the abstract `create()` JSDoc's `{@link has}/{@link list}` link ([packages/session-persistence/session-persistence/src/index.ts](../../../../packages/session-persistence/session-persistence/src/index.ts) — drop the `has` link), the coordinator's "six public methods"/"six public service methods" module + class JSDoc and its lazy-materialization JSDoc justifying the `materialized` flag by "the signal `has`/`list` rely on" ([packages/session-persistence/session-persistence/src/coordinator.ts](../../../../packages/session-persistence/session-persistence/src/coordinator.ts)), the JSONL backend's `loadStored`/`deleteStored` comment, and the SQLite backend's `schema.ts` and `index.ts` comments that mention "absent from `has`/`list`" — all reworded to the surviving four-method, `list()`-only contract.
+- `SessionPersistence.has()` / `.delete()`: delete the abstract declarations, the coordinator's `has`/`delete`/`deleteCore`, and the `PersistenceBackend.deleteStored` hook. Remove the `has`/`delete` rows from the contract suite and the per-backend specs (jsonl + sqlite each implemented `deleteStored` only to satisfy the hook — that implementation goes too). The backends are the [dual-backend](../../implemented/architecture/2026-06-14-session-persistence.md) design and otherwise out of scope, but removing a hook they implement for no consumer is part of removing the hook, not a backend redesign.
+- Update every doc and source-comment reference to the removed methods — not only literal `has(`/`delete(`/`deleteStored` call spellings, but also `{@link has}`/`{@link delete}` JSDoc links and prose that counts the methods (removing 2 of the persistence service's 6 public methods makes any "six public methods" phrasing wrong). The implementing PR greps `has`/`delete`/`deleteStored`/`{@link `/`six ` across `docs/`, `packages/*/README.md`, and source comments, and fixes each. The known doc sites: the seam README ([packages/session-persistence/session-persistence/README.md](../../../../packages/session-persistence/session-persistence/README.md)'s `has(id)`/`delete(id)` API row and its "delegates its six public service methods" prose → four), the backend READMEs that describe `has`/`list` semantics ([packages/session-persistence/session-persistence-sqlite/README.md](../../../../packages/session-persistence/session-persistence-sqlite/README.md), [packages/session-persistence/session-persistence-jsonl/README.md](../../../../packages/session-persistence/session-persistence-jsonl/README.md) — reword "absent from `has()`/`list()`" to just `list()`), the service-map / seam docs in [docs/architecture.md](../../../architecture.md), and the persistence prose in the [session-persistence RFC](../../implemented/architecture/2026-06-14-session-persistence.md) and [shared write-coordinator RFC](../../implemented/architecture/2026-06-18-shared-persistence-write-coordinator.md). The known source-comment sites: the abstract `create()` JSDoc's `{@link has}/{@link list}` link ([packages/session-persistence/session-persistence/src/index.ts](../../../../packages/session-persistence/session-persistence/src/index.ts) — drop the `has` link), the coordinator's "six public methods"/"six public service methods" module + class JSDoc and its lazy-materialization JSDoc justifying the `materialized` flag by "the signal `has`/`list` rely on" ([packages/session-persistence/session-persistence/src/coordinator.ts](../../../../packages/session-persistence/session-persistence/src/coordinator.ts)), the JSONL backend's `loadStored`/`deleteStored` comment, and the SQLite backend's `schema.ts` and `index.ts` comments that mention "absent from `has`/`list`" — all reworded to the surviving four-method, `list()`-only contract.
 
 ## Why not keep them as "the seam should be complete"?
 
-The instinct that a persistence seam "should" offer delete, or a task executor "should" offer enumeration, is real — and it is exactly the speculative-completeness the pre-release stance warns against ([AGENTS.md](../../../../AGENTS.md): optimize for the correct foundation, not for hypothetical callers you do not have). Each of these is one method to re-add the day a consumer needs it:
-
-- A session-management UI that deletes old sessions will want `delete()` — add it then, designed against that UI's real needs (soft-delete? cascade? confirmation?), not guessed now.
-- A `bash_list` tool that shows the model its running tasks will want `list()` — add it with the tool.
+The instinct that a persistence seam "should" offer delete is real — and it is exactly the speculative-completeness the pre-release stance warns against ([AGENTS.md](../../../../AGENTS.md): optimize for the correct foundation, not for hypothetical callers you do not have). `delete()` is one method to re-add the day a consumer needs it: a session-management UI that deletes old sessions will want it — add it then, designed against that UI's real needs (soft-delete? cascade? confirmation?), not guessed now.
 
 Re-adding a seam method with a live consumer is cheap and better-designed than the speculative version, because the consumer pins the contract. Carrying it unused means every implementation (and every future backend) must implement and test a method that does nothing.
 
 ## Acceptance criteria
 
-- `has`/`delete`/`deleteStored` are gone from the persistence seam, impl, and contract suites; `pnpm run knip` reports no new dead exports. (The bash `get`/`list` removal was reverted — see the implementation note above; those methods remain.)
-- The remaining seam operations (`create`/`append`/`load`/`list` for persistence; `run`/`start`/`get`/`ownerOf`/`list`/`onTaskDone`/`readOutput`/`kill`/`resolve` for bash) are untouched; ACP `session/list`, bash tool flows, and crash-recovery behave identically.
+- `has`/`delete`/`deleteStored` are gone from the persistence seam, impl, and contract suites; `pnpm run knip` reports no new dead exports.
+- The remaining persistence operations (`create`/`append`/`load`/`list`) are untouched; ACP `session/list` and crash-recovery behave identically.
 - `pnpm run test:coverage` stays 100% per-file (the contract/spec rows for the removed persistence methods are deleted with them).
-- Persistence seam READMEs and `docs/architecture.md` no longer list the removed `has`/`delete` methods.
+- The persistence seam README and `docs/architecture.md` no longer list the removed `has`/`delete` methods.
 
 ## Risks
 
 - **`delete()` is the kind of operation a product eventually wants.** True — but "eventually" is the point. Deleting it now and re-adding it against a real consumer is strictly better than shipping a guessed contract. The dual backends each shed a `deleteStored` impl, which is a bounded edit in otherwise-out-of-scope packages.
-- **`list()` on the bash seam is the natural seed for a future `bash_list`.** Acknowledged in the [pre-release foundation stance](../../../../AGENTS.md): add the seed when the tool lands. The executor still tracks tasks internally (the `tasks` map backs `ownerOf`/`readOutput`/`kill`); exposing an enumeration is a one-line re-add.
-- **Low coupling.** Both removals are confined to their seam + impl + tests; no cross-package consumer references the removed methods, so there is no ripple beyond the docs.
+- **Low coupling.** The removal is confined to the persistence seam + impl + tests; no cross-package consumer references the removed methods, so there is no ripple beyond the docs.
 
-Modest size, but it converts two seams from "what an implementation must provide for nobody" back to "exactly what a consumer uses."
+Modest size, but it converts the seam from "what an implementation must provide for nobody" back to "exactly what a consumer uses."