fix(e2b): address the v7 review round

- restore the parent's AGENTS.md body around this branch's e2b row (the
  replay had resurrected the pre-profile-CLI layout, deleting the api/,
  bundle/, settings/, and credentials/ groups); the fs/lsp row
  condensations stay for the word budget
- aggregate the composite rollback failure, not the original error, when
  private state cleanup also fails — a surviving remote group is no
  longer hidden by a later cleanup error (triple-failure regression)
- own the state directory before the makeDir RPC, matching the terminal
  transaction, so a cancellation racing a committed creation still
  enters cleanup
- drop the hidden pollMs parameter defaults; the schemastery default is
  the one home, and tests pass the cadence explicitly
- restore spawn/spawnTerminal graceMs validation to the seam's
  documented bound (the earlier removal cited subprocess-local as not
  validating; it does), with rejection regressions

AGENTS.md

@@ -12,10 +12,11 @@ DeepSeek Harness SDK is a plugin-based agent harness on vendored Cordis: **every
 vendor/      Vendored Cordis source — manifest + sync procedure in vendor/README.md
 packages/    @deepseek-ai/dsh-<pkg> workspaces at packages/<group>/<pkg>/
   core/        product API spine: session, system-prompt, tools, agent, agent-loop
+  api/         Remote BFF assembly and TypeRT RPC gateway
   typert/      type graph generator, loader, and runtime registry
   llm/         LLM seam + DeepSeek adapters (direct-fetch + pi-ai design twin)
   e2b/         E2B POC: sandbox + FS/subprocess adapters
-  bash/        bash executor seam + local impl + model-facing bash tools
+  bash/        bash executor seam + local/pwsh impls + model-facing shell tools
   subprocess/  subprocess seam + local process-tree impl
   pty/         persistent PTY seam/backend/tools
   fs/          filesystem seam/backends/policy/tools
@@ -25,6 +26,7 @@ packages/    @deepseek-ai/dsh-<pkg> workspaces at packages/<group>/<pkg>/
   compact/     compaction seam + basic backend
   context/     request-context plugins
   subagent/    subagent seam + spawn/fork/ACP backends + delegation tool
+  bundle/      profile plugin bundles: installable patch layers for dsh --profile
   workflow/    workflow seam + worker-thread engine + workflow tool
   todo/        todo_write tool
   plan/        plan mode as logged per-agent collaboration state
@@ -32,9 +34,11 @@ packages/    @deepseek-ai/dsh-<pkg> workspaces at packages/<group>/<pkg>/
   cordis/      self-referential toolset: the agent inspects/mounts plugins in its own runtime
   hooks/       Claude Code/Codex hook bridges + shared wire-protocol library
   session-persistence/  persistence seam + JSONL/SQLite backends
+  settings/    user-settings seam + file-backed provider
+  credentials/ credential-reference seam + env-over-.env provider
   acp/         automation-only Agent Client Protocol server
-  ui/          TUI/JSON-RPC bridges; boot, approval, interaction plugins
-  examples/    demo bundles (agent-spine + TUI/CLI/ACP/JSON-RPC bins) leaves load
+  ui/          JSON-RPC bridge; boot, approval, interaction plugins
+  examples/    demo bundles (agent-spine + CLI/ACP/JSON-RPC bins) leaves load
   support/     dev/test infrastructure
   util/        zero-dependency utilities
 python/      Python SDK and bundled runtime (see python/README.md)
@@ -56,7 +60,7 @@ pnpm run clean           # remove build outputs and safe residue from deleted pa
 pnpm run test           # vitest unit tests
 pnpm run test:coverage  # CI coverage gate: per-file 100% on packages/*/*/src
 pnpm run test:e2e       # real-API tests; self-skip without DEEPSEEK_API_KEY
-pnpm run test:snapshot  # keyless ACP/headless/TUI replay vs expected outputs; filter: -t <name>
+pnpm run test:snapshot  # keyless ACP/headless replay vs expected outputs; filter: -t <name>
 pnpm run test:snapshot:record  # re-record expected outputs (needs key)
 pnpm run typecheck
 pnpm run lint
@@ -67,7 +71,6 @@ pnpm run hygiene        # knip + publint + workspace constraints + NodeNext cons
 pnpm run doc-sync       # all documentation gates; leaf list in scripts/run-gates.ts
 pnpm run website:build  # VitePress build (doubles as dead-link check)
 pnpm run demo:headless "task" # one-shot agent (needs DEEPSEEK_API_KEY)
-pnpm run demo:tui       # full-screen TUI coding agent (needs DEEPSEEK_API_KEY)
 pnpm run demo:cordis    # the agent modifies its own runtime (needs key)
 pnpm run demo:acp       # ACP automation server (needs DEEPSEEK_API_KEY)
 ```
@@ -78,7 +81,7 @@ When required `gh`, `pnpm`, build, test, or generator commands fail because the
 
 ### Run relevant checks locally
 
-Agents MUST run relevant tests and checks before pushing; select them with [dsh-pre-push-checks](.agents/skills/dsh-pre-push-checks/SKILL.md) and report only commands run.
+Run checks before pushes via [dsh-pre-push-checks](.agents/skills/dsh-pre-push-checks/SKILL.md); report only commands run. After `gh stack sync`, validate immediately; do not merge before checks pass.
 
 - Match evidence to the surface: focused tests for behavior, snapshots for model or user output, `doc-sync` for docs, build/hygiene and built smokes for published paths, and real-API e2e for provider behavior.
 - Never default to the full suite or repeat a passing check for commit or push. CI owns exhaustive coverage and the platform matrix; rehearse all locally only by explicit request, for CI diagnosis, or for an irreducibly repository-wide change.
@@ -91,7 +94,7 @@ Real-API tests and demos read `DEEPSEEK_API_KEY`, optional `DEEPSEEK_BASE_URL`,
 ## Conventions
 
 - Every npm package is `@deepseek-ai/dsh-<name>`; vendored packages keep upstream names and are `private: true`. `cordis` is a peerDependency (+ dev) of every harness package.
-- ESM everywhere (`"type": "module"`). Cross-package imports use package names; in-package relative imports include `.ts`. Config subprocesses run built `lib/` under plain Node; source regressions use their declared launcher ([testing policy](docs/testing.md#test-subprocess-launch-modes)). The `dsh` CLI source launch runs through tsx's ESM-only hook (`node --import tsx/esm`); modules it reaches must stay ESM (no CJS-only shapes) — Node's native TypeScript modes are unavailable across the engines range ([source-launch contract](.agents/notes/implemented/architecture/2026-07-29-dsh-source-launch-tsx-esm.md)). TUI/Web `cordis.yml` bare plugins must appear in their resolver manifest's `dependencies`; `verify-cordis-config` enforces it.
+- ESM everywhere (`"type": "module"`). Cross-package imports use package names; in-package relative imports include `.ts`. Config subprocesses run built `lib/` under plain Node; source regressions use their declared launcher ([testing policy](docs/testing.md#test-subprocess-launch-modes)). The `dsh` CLI source launch runs through tsx's ESM-only hook (`node --import tsx/esm`); modules it reaches must stay ESM (no CJS-only shapes) — Node's native TypeScript modes are unavailable across the engines range ([source-launch contract](.agents/notes/implemented/architecture/2026-07-29-dsh-source-launch-tsx-esm.md)). Raw/Web `cordis.yml` bare plugins must appear in their resolver manifest's `dependencies`; `verify-cordis-config` enforces it.
 - **Registrations are effects**: every contribution goes through `ctx.effect()` / `ctx.on()`; a registry's `register()` returns the disposer.
 - **Runtime invariants assert owned relationships.** Check authoritative event streams or mutable data, not service or method presence, plugin metadata or effects, or fixed pure examples. If a package has no plausible relationship, an explained empty companion is correct ([package contract](packages/AGENTS.md)).
 - **Typed events use declaration merging** and merge-extensible maps. Event JSDoc needs `@mode` and payload `@param`; scoped keys absent from payloads need `@dshScopeScan unsupported`. Public service methods document parameters and non-void returns.
@@ -115,7 +118,7 @@ Real-API tests and demos read `DEEPSEEK_API_KEY`, optional `DEEPSEEK_BASE_URL`,
 - **Testing policy** — [docs/testing.md](docs/testing.md). Every non-trivial model- or product-user-visible behavior change adds or updates a keyless snapshot through a real runnable example in the same PR; package tests, e2e-only assertions, and mock-only fixtures do not substitute for the assembled application transcript. Fixtures must replay on macOS/Linux; fix fixtures, not normalizers.
 - **A tool's UI render intent is part of its design**, decided up front (`generic`/`terminal`/`diff`, `locations`); presentation methods are pure functions of `args` ([cookbook](docs/cookbook/adding-a-tool.md)).
 - **Plan unit, e2e, and snapshot coverage** for new seams, lifecycle shapes, and transcript surfaces; missing snapshot-harness support is part of the implementation, not deferred follow-up.
-- **Use incremental merge commits.** Split independent changes. Pushed history may be rewritten before review; afterward prefer new commits. Fix the introducing PR before merging down-stack. If the base advances mid-merge, finish the checkpoint, push when authorized, then merge the newer tip separately ([rationale](.agents/notes/implemented/process/2026-07-26-incremental-pr-base-retargeting.md)).
+- **Choose PR history deliberately.** Split independent changes; fix the introducing PR before propagation. Standalone PRs and official stacks may merge-forward or rebase after review. Rewrites use `--force-with-lease`, abort on remote movement, never raw `--force`; an in-progress merge-forward preserves its checkpoint before taking a newer base ([rationale](.agents/notes/implemented/process/2026-08-02-native-github-stacks-and-optional-rebases.md)).
 - **Label PRs:** one kind (`feature`/`bug-fix`/`doc`/`testing`/`cleanup`), each matching area; the [taxonomy](.agents/notes/implemented/process/2026-07-25-semantic-pr-label-taxonomy.md) is extensible.
 - TODO markers: `FIXME`/`TODO`/`XXX` by urgency ([semantics](docs/development.md)).
 - Files end with exactly one trailing newline; `git diff --cached --check` (pre-commit) gates it.