## Thinking Path
> - Paperclip manages AI agents and their tasks.
> - A task can outlive a provider process or a server restart.
> - Legacy recovery treated unknown tool outcomes as a permanent
execution hold.
> - That hold could also reject a later user message.
> - A conversation turn can use prior history without replaying prior
tool calls.
> - This pull request lets supported conversation adapters continue
within the existing retry budget.
> - Users can send a new message after automatic attempts stop.
## Linked Issues or Issue Description
**What happened?**
A server restart could interrupt a local ACP run and leave its task
behind a permanent recovery hold. A later user message could be
cancelled before the provider answered. The immediate recovery path
could also create a successor outside the durable failure counter.
**Expected behavior**
Continue with a bounded new conversation turn. Preserve a compatible
provider session or use full task context when it is unavailable. Do not
replay recorded tools. When automatic attempts stop, allow a new user
request through the normal execution gates.
**Steps to reproduce**
1. Start a task with a local conversation adapter.
2. Restart the server while the provider is working.
3. Let the previous run become interrupted.
4. Send a follow-up message and observe the recovery hold on the old
behavior.
Related work: Refs #13075 for durable task recovery. Refs #12946 for
retry-limit and checkout-lock handling. This change routes conversation
recovery through the existing bounded scheduler.
## What Changed
- Mark supported local conversation failures for continuation. Keep
native-runner and non-conversation recovery rules.
- Carry an interruption notice into the next turn. Retain stopped ACP
session history even when a write outcome is unknown.
- Clear unavailable ACP sessions so the next bounded attempt can use
full task context.
- Route immediate failure recovery through the same durable scheduler as
process-loss recovery. Release only the predecessor checkout when its
retry takes ownership.
- Retire obsolete conversation holds using immutable run evidence, in
bounded batches with an activity record. Preserve outcome evidence and
do not wake historical tasks.
- Block actual admission and Resume while a predecessor process or
environment lease is still active. Keep the original interruption notice
after a rejected wake. Preserve the upstream blocked-wake waiting
contract: bounded retry planning can happen during cleanup, while
deferred messages and execution remain gated.
- Add subprocess and database regression tests. Update the execution
contract.
- Add the current thread-status field to the native recovery provider
fixture so its damaged-journal test reaches the intended boundary.
Tolerate an already-exited fixture process during test cleanup while
still asserting both processes terminate.
## Verification
- Workspace typecheck passed: `pnpm -r typecheck`.
- Build passed: `pnpm build`.
- Module boundaries passed: `pnpm check:module-boundaries`.
- Focused tests passed: 293 recovery/session/dispatch tests, 66 retry
and response-gate tests, and 37 native-session tests. Some suites
overlap.
- Tests cover interrupted writes, missing sessions, concurrent retries,
restart persistence, pending questions and approvals, execution gates,
and historical holds.
- Built the Rust test executables with `pnpm --filter
@paperclipai/paperclip-runner build:rust` for native-runner
verification.
- Full Vitest coverage verified locally using the repository’s general
and serialized shards, with focused reruns for failures and files not
reached after a shard stopped. The ownership-gate regression is fixed
and the complete affected server shard passes (1,390 tests). Local
parallel runs also hit temporary-directory, resource, and timing
failures; those suites pass with canonical temporary paths and
sequential reruns. No test timeouts were increased.
- Final merged-branch regression run: 577 tests pass across process
recovery, retry scheduling, liveness, durable chat, wake-queue
application/adapter, dispatch, continuation, native sessions, and task
chat. Earlier focused verification also passed 19 native control tests.
Token gates and whitespace validation pass.
- Browser verification passed all three ACP Stop/continue/pause
scenarios, including a rerun after merging the upstream waiting
behavior: `PAPERCLIP_E2E_PORT=3397 pnpm test:e2e
tests/e2e/acp-stop-continuation.spec.ts`. The interrupted-write case
verifies that follow-up completes without a repeated write.
- Final-head [CI run
34625037394](https://github.com/paperclipai/paperclip/actions/runs/34625037394)
passed on `06ac4bd9d150f8b209a96e5fd609c696958794a0`: all 31 reported
checks are green, including server/workspace suites, all browser shards,
native runner verification, build, typecheck, release dry run, and
aggregate gates. The two conditional Storybook checks were skipped.
Greptile reviewed this exact commit at 5/5; all review threads are
resolved.
## Risks
- A new model turn can choose to repeat an action. Paperclip does not
replay recorded tool calls and does not certify unknown action outcomes.
- Conversation adapters now stop after their retry budget instead of
requiring action reconciliation. Explicit Stop, pause, dependency,
approval, budget, and ownership gates remain in force.
- No schema migration or dependency changes. Historical holds are folded
without changing task status or waking work.
## Model Used
OpenAI GPT-6 through Codex, with reasoning, repository tools, code
execution, and test execution. The session does not expose a more
specific model build ID or context-window size.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work.
> - People also ask agents for work in their existing chat tools.
> - Each external conversation needs one task and a current authorized
source.
> - Retries, Stop, and provider failures must not duplicate work or
expose private data.
> - The first chat PR establishes the opt-in provider and data
contracts.
> - This PR adds experimental channel integration and its durable
control plane.
> - Users can request work from connected channels and inspect delivery
in Paperclip.
## Linked Issues or Issue Description
Refs #13100 and #13092. This is the second of exactly two chat PRs.
Foundation #13100 is merged and changed 143 files. Runner prerequisite
#13092 is also merged. This PR changes 400 files against master, below
the 500-file review limit. It contains no wireframe images or HTML
galleries.
## What Changed
- Add native Slack, GitHub, Microsoft Teams, Telegram, and Discord chat
connections. Keep chat disabled unless the operator enables experimental
chat connectors. Preserve the production GitHub tool connection and its
normal setup path.
- Bind each provider bot identity to one immutable Paperclip agent. Bind
each admitted external conversation to one task. Paperclip owns tasks,
runs, permissions, and audit records.
- Add durable admission, per-conversation queues, questions, task
controls, progress, final replies, images, files, and delivery receipts.
Board comments remain internal unless explicitly sent to the channel.
- Check current identity, provider reach, resource access, credentials,
runtime generation, and exact source before provider effects. Keep
private responses private. Never send raw reasoning, private logs,
credentials, or tool arguments.
- Hold uncertain sends for explicit audited resolution. Make Board
Send-to-channel atomic and idempotent. Keep reconnect and setup
credentials in Paperclip secret storage.
- Preserve current native-runner authority across retries, lost
acknowledgements, and recovery. Keep immutable input and completion
contracts separate from newer user input. Receipt reconciliation cannot
launch a provider.
- Reconcile chat close/new ordering and provider-effect lock order.
Audit resource access changes in the same transaction. Submit only the
selected resource from each UI toggle so stale pages cannot undo
unrelated access changes.
- Drain Codex stdout before certifying process exit. Bound the drain
with the existing shutdown grace. Preserve observed terminal authority
without treating an undrained process as successful or reusable.
- Incorporate master `018ca5da` with its ACP Stop, mobile task layout,
runner packaging, and official lock changes. Preserve dedicated
chat-answer continuations in both directions when ordinary queued
comments are adopted after Stop.
- Fence late adapter readiness behind an earlier Stop for the same run.
Preserve verified cleanup for registered adapters. Handle single Stop,
agent pause, duplicate Stops, and failure release without creating a
false cancellation receipt.
- Incorporate master's `6dd48cad4` wake-queue extraction. Preserve exact
failed-chat retry authorization and lineage, retired question-source
suppression, and the block on generic recovery that would discard the
admitted source. Fresh deferred input retains its separate promotion
path.
- Incorporate master `2a05b5ed3` and its queue-admission extraction,
simplified transaction ports, and separate runner CI job. Preserve exact
durable receipts, actor separation, and dedicated-answer isolation
through the new module. A failed receipt insert rolls back the
accompanying deferred-wake merge.
## Verification
Current head: `afe19299d06253cb628eb398e91d1200ea9f412a`, incorporating
master `2a05b5ed3457ea33efd6895520447d1d97fe98d8`. The conflicts are
resolved. This successor fixes two test-harness boundaries exposed by
CI: per-case route-module preparation and actual durable-save completion
before intentional runner termination. Production code and all existing
test/turn deadlines are unchanged. [Exact-head Greptile
review](https://github.com/paperclipai/paperclip/pull/13038#issuecomment-5587250594)
is **5/5**, completed September 10 at 13:20:55 UTC, with no actionable
findings or open review threads. [Fresh exact-head
CI](https://github.com/paperclipai/paperclip/actions/runs/34481724341)
passes **all 24 jobs**, including Build and both required aggregates.
Normal exact-head guarded merge was attempted and rejected by the
remaining branch approval policy: CODEOWNER review is required and no
human approval is present. Normal **squash auto-merge is enabled** as of
September 10 at 13:36:26 UTC. Requested CODEOWNERS have been notified;
no approval bypass or self-approval was used. Earlier-head results below
remain historical evidence, not qualification of this successor.
- Final exact-head Linux evidence: 995/995 chat integration cases; 36/36
agent-skills routes; 35/35 runner live-session cases, including real
process kill/resume; 1948 runner Vitest cases with three existing
benchmark/platform guards; 870/870 API-authority cases; and 104 browser
cases with four existing optional skips. Rust, conformance/replay, full
repository build, typecheck, canary, all server/workspace shards, and
both required aggregates pass with normal CI concurrency. Earlier failed
attempts remain recorded below.
- Latest test-only qualification: 141/141
route/permissions/authentication cases pass in separate cold forks, with
plain server types and independent review clear. The real-runner suite
passes 35/35, with plain runner types and independent review clear. A
controlled premature-save acknowledgement fails as expected; matching
ownership/effect/process evidence, rejected saves, real turn outcome,
test abort, and pre-kill liveness are covered. No local reproduction of
the original CI scheduling failure is claimed. The preceding [CI
run](https://github.com/paperclipai/paperclip/actions/runs/34479680858)
passes 21/24 jobs, including all 995 Linux chat cases and browser
aggregate (104 passed, four existing optional skips); only Build, the
skills serialized shard, and the required verification aggregate fail.
Its exact-head Greptile review was 5/5. Both failed job logs are
retained.
- Final fixture qualification: all eight focused Discord cases and all
995 chat integration cases pass. The exact modal statement/PID is
observed before taking the real connection lock; the test then proves
its actual blocking relationship before mutation. Original SQL
execution, provider behavior, negative assertions, and 1s/15s timeouts
remain unchanged. Independent review is clear and test/production hashes
remain frozen. The preceding [CI
attempt](https://github.com/paperclipai/paperclip/actions/runs/34477184777)
passed 22 jobs, including Build/runner, typecheck, canary, all other
test shards, and browser aggregate (104 passed, four existing optional
skips); the two fixture failures and failed verification aggregate
remain recorded, not relabeled as a pass.
- Current queue-module composition: 308/308 recovery/batching/queue/Stop
tests; 995/995 full chat integration; 89/89 module tests, including real
PostgreSQL receipt-insert rollback; 24/24 workflow/module-boundary
tests; plain server and UI types. All four actual local process/ACP
browser paths pass in 1.4 minutes. Fresh databases, no skips or retries,
stable reviewed source hashes. The initial boundary failure is retained;
its no-op service wrapper was removed without changing recovery context
or weakening the check. An exploratory standalone test-directory
typecheck fails because its new upstream transformation config is not a
standalone typechecking project; standard CI/build does not invoke it,
and no configuration was weakened to suppress those diagnostics.
- The preceding head `e02a63d462ce5d47433b0aeb632bb6fd20aab1ba` passed
[all 24 CI
jobs](https://github.com/paperclipai/paperclip/actions/runs/34436462958)
and exact-head Greptile review at 5/5. Required CODEOWNER review
prevented its normal merge before master advanced again.
- Final extracted-module composition: 307/307 recovery, batching, queue
and Stop-control tests; 995/995 full chat integration; 49/49 module
tests including eight PostgreSQL adapter cases; and 19/19 issue-update
tests. Plain server types pass. All four actual local process/ACP
browser paths pass in 1.3 minutes. Fresh databases, no skips or retries
in these cohorts, frozen source hashes, and independent review clear.
- The preceding head `3e4e1c1c` passes [all PR CI
jobs](https://github.com/paperclipai/paperclip/actions/runs/34415826820),
including Build and required `ci / verify` and `ci / e2e`. Both the
original Rust failure and the previously load-sensitive lineage fixture
pass with unchanged Linux concurrency. Master advanced afterward and
required this reconciliation.
- Final master composition: 448/448 focused UI tests, 186/186 adapter
tests, 24/24 queue/control tests, and 11/11 packaging tests. Plain UI,
server, shared, and adapter types pass. Token gates and diff checks
pass. Independent server and UI reviews are clear.
- Stop-registration regression: both real-service cases fail against
exact `a95` source and pass with the fix. The full corrected
recovery/control suite passes 265/265. Duplicate-owner and failed-Stop
controls also pass. Plain server types pass. The readiness barrier
prevents provider startup without adding an acknowledgment to an already
terminal run.
- Final qualification strengthens terminal-field equality and repeats
both affected cases successfully on a fresh database. All four actual
local process/ACP browser paths pass again in 1.3 minutes, without skips
or retries. The final screenshot shows Cancelled, a paused subtree,
retained input, and no error toast.
- Two new actual-service regressions fail before the merge fix. They
prove that queued-comment adoption could consume a dedicated chat answer
or add unrelated input to that answer. The fixed four-case cohort
passes, including ordinary upstream continuation and adapter Stop
controls. Full recovery passes 257/257. All four actual local
process/ACP Stop browser flows pass in 1.4 minutes, without skips or
retries, on a fresh database.
- The unchanged runner artifact was qualified with 171/171 transport
tests, 870/870 API-authority tests, conformance 1/1, and replay 11/11.
Six controlled reader tests prove the exit/drain repair. Its local
serial Rust workspace passed 546 top-level cases plus two invoked
helpers; the later passing Linux CI supplies default-concurrency
evidence.
- Prior exact-source full chat integration passes 995/995. Settings
regressions cover concurrent stale pages, 501 destinations, pending
state, rejected updates, and explicit retry. These deterministic tests
do not prove live provider behavior.
- Retained failed attempts and their causes are in the [qualification
log](afe19299d0/doc/plans/chat-adapters/2026-09-08-chat-queue-and-webhook-repair.md).
The first merge adapter run timed out while macOS slept for 290 seconds.
Its unchanged repeat passed with a temporary sleep guard. No assertion,
deadline, or CI gate was weakened.
Review commands include `pnpm --filter @paperclipai/server exec vitest
run src/__tests__/heartbeat-process-recovery.test.ts
src/__tests__/issue-queued-comments-routes.test.ts` and `pnpm exec
playwright test --config tests/e2e/playwright.config.ts
tests/e2e/acp-stop-continuation.spec.ts`. Database suites require fresh
disposable databases. See the [browser
runbook](afe19299d0/doc/plans/chat-adapters/2026-09-04-chat-adapters-browser-e2e-runbook.md)
for provider setup and separate live acceptance steps.
## Risks
- This remains experimental. Deterministic tests and bounded live
evidence do not establish every provider feature, tenant, permission
layout, or media shape. Teams work-tenant qualification is still open.
- Failed and uncertain provider effects remain visible and can require
operator action. A transport receipt does not prove recipient
visibility.
- Native controller and runner artifacts must remain compatible.
Preserve lease ownership, terminal authority, source binding, and
quarantine during future changes.
- Access and audit rows commit together, but activity notifications
remain best-effort. This is not a new durable event outbox.
- The PR operation does not deploy a live server, replace its runner, or
change provider permissions. Remaining live qualification is documented
in the [temporary
handoff](afe19299d0/doc/plans/chat-adapters/2026-09-08-open-qualification-followups.md).
## Model Used
OpenAI Codex assisted with implementation, tool execution, testing, and
review. The work records `gpt-6-astra` assistance. The environment does
not report a context-window size. No private reasoning traces are
included.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work.
> - Task controls coordinate provider execution and queued user
messages.
> - Stop could finish before an embedded ACP provider stopped its tools.
> - A later request could be held for reconciliation without a clear
task response.
> - A restored provider could also retain the stopped run's API
credential.
> - This pull request verifies provider termination and preserves safe
session continuation.
> - Operators can continue known-safe work and see why uncertain work
cannot start.
## Linked Issues or Issue Description
**What happened?**
Stop could leave an embedded ACP provider running. A queued follow-up
followed by “go” could fail before it reached the provider. Task chat
could show a generic missing-response message. Even a restored session
could use the previous run's credential and fail its task update.
**Expected behavior**
Stop waits for confirmed provider termination. A later explicit wake
continues the same compatible session only when recorded actions have
known outcomes. It carries pending comments and the current run's
environment. Uncertain actions retain a visible reconciliation hold.
Composer Stop preserves the existing pause rule: conversation can
continue while paused, but task work requires Resume.
**Steps to reproduce**
1. Start an embedded ACP task.
2. Send a second request while the provider is running.
3. Interrupt the run, then send “go”. Also test composer Stop followed
by Resume work.
4. Check that the request is delivered once and that the provider can
complete the task through the current run's API credential.
5. Repeat with an unfinished write. Confirm that the write stops and
that further execution stays blocked with a visible reason.
**Paperclip version or commit**
Built from source on master at `3bc60dd8b` plus this branch.
**Deployment mode**
Local source build with an isolated embedded PostgreSQL instance.
Refs #11183. Refs #12552. Those changes address recovery after operator
cancellation. This change also covers embedded ACP termination, session
proof, pending-comment delivery, and task feedback.
## What Changed
- Propagate Stop into embedded ACP and wait for bounded adapter cleanup
and provider exit. Retain the actual ChildProcess object for forced
termination on all platforms; never signal a recycled numeric PID.
- Preserve interrupted checkpoints only for acknowledged, local,
persistent sessions with settled reads or no tools. Keep writes,
incomplete actions, and forced termination blocked.
- Restore the same compatible provider session with the current run's
environment. Reject fresh-session fallback for an interrupted
checkpoint.
- Adopt pending comments on the next explicit wake. Stop alone does not
dispatch them.
- Share the execution-blocker rule across dispatch, Resume, and task
detail. Show Stopped or Couldn't start with the recorded reason. Resolve
the stopped agent for the run link, including reviewer runs.
- Keep execution reconciliation holds intact when generic recovery sees
queued comments or healthy child tasks.
- Add process, service, component, and browser regression coverage. Fix
disposable database cleanup and React test settling exposed by the full
suite.
## Verification
- Passed `pnpm -r typecheck`, `pnpm build`, and `pnpm
check:token-gates`.
- Passed all three `acp-stop-continuation.spec.ts` browser journeys.
They use an actual ACP child process and require task completion through
the agent API.
- Passed 165 adapter execution, operator-stop, and child-process control
tests, 17 queued-comment route tests, and 65 tests in the two adjusted
UI suites. Earlier focused recovery, heartbeat, and task-control tests
also passed.
- Manually used the browser to queue a request, Stop, send “go” while
paused, and Resume. The same session answered once and moved the task to
Done with the current run's credential.
- Manually interrupted an unfinished write. Its file size stayed fixed
for five seconds. “Go” showed the reconciliation reason and did not
start another provider prompt.
- Separate live Claude ACP smoke checks confirmed that Stop ended a
disposable local write and that a no-tool interruption could resume the
exact provider session. The browser fixture does not call Drive or
another external app.
- Passed all 5,615 UI tests and 3,090 other workspace tests. The CLI and
general server groups pass with targeted retries: two transient server
failures passed together on retry, and two embedded-database startup
failures passed after removing abandoned shared-memory segments from
this task's completed browser fixtures. All 144 serialized server suites
completed, with 2,189 tests passing after two transient HTTP socket
failures passed on retry.
- Passed all 135 heartbeat process/recovery tests, including a
deterministic regression that failed before the recovery-sweep fix.
- Passed 18 dispatch integration tests, including stopped-reviewer
links, company boundaries, and malformed run IDs.
- Greptile is 5/5 on `7dd170d83`, with zero unresolved review threads.
The security scan and all required CI gates pass for the same commit.
## Risks
- Safe continuation depends on complete tool reporting and a restorable
local provider session. Unknown outcomes remain blocked and require
reconciliation.
- Provider cleanup can take time. A timeout does not grant replay
permission.
- The change adds optional adapter context fields and an optional issue
projection. It does not change the database schema or require a
migration.
- Test cleanup truncates company data only in a disposable test
database.
## Model Used
OpenAI GPT-6, running as Codex with repository tools, code execution,
and browser interaction. The runtime does not expose a more specific
model deployment ID or context-window size.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work
> - Local Claude, Codex, Gemini, and custom ACP adapters run through the
shared embedded ACPX engine
> - That engine wrapped every local agent command in a generated Bash
script to inject environment variables and filter child stderr
> - Windows cannot directly spawn that Bash wrapper, and npm/pnpm ACP
binaries are exposed through `.cmd` shims there
> - ACPX 0.12 already supports per-session child environment variables,
so the wrapper is unnecessary
> - This pull request registers agent commands directly, injects env
through ACPX session options, captures child stderr in-process, and adds
a real Node ACP spawn smoke on Ubuntu and Windows
> - The benefit is one cross-platform spawn path with a reusable smoke
test instead of parallel shell-wrapper implementations
## Linked Issues or Issue Description
Fixes#9941.
Refs #9428 and #9771.
**What happened**
ACPX-backed local agents failed to start on Windows because Paperclip
registered a generated POSIX `.sh` wrapper as the agent command. Windows
also needs the `.cmd` npm/pnpm shim when resolving built-in ACP
binaries, and symlink creation can fail with `EPERM` for seeded
auth/skill files.
**Expected behavior**
The same ACPX engine path should spawn a real ACP agent on Windows and
Linux, forward Paperclip/runtime env without mutating `process.env`,
preserve filtered/unfiltered child stderr behavior, and fall back to
copies where Windows symlinks are unavailable.
**Steps to reproduce**
Run a local ACPX adapter on Windows with the prior wrapper path. ACPX
attempts to spawn the generated `.sh` file and the agent never
initializes.
**Deployment mode**
Local Paperclip adapters using
`packages/adapter-utils/src/acpx-engine/`.
## What Changed
- Removed generated Bash agent/env wrappers and registered local
commands directly with ACPX.
- Passed the resolved child environment through ACPX
`sessionOptions.env`, including resume retry paths.
- Added a minimal `acpx@0.12.0` package patch exposing child stderr
callbacks and allowing documented uppercase env-map keys in persisted
session options.
- Moved stderr tee/filter behavior in-process: raw stderr remains in the
per-run file while benign `nes/close` noise is omitted from live stderr.
- Preferred `.cmd` ancestor binaries on Windows and added `EPERM` copy
fallbacks for Codex auth seeding and Gemini skill materialization.
- Added a real Node ACP echo-agent spawn smoke that can run directly on
any supported platform.
## Verification
- `pnpm exec vitest run
packages/adapter-utils/src/acpx-engine/execute.test.ts
packages/adapter-utils/src/acpx-engine/spawn-smoke.test.ts` — 57 passed.
- `pnpm --filter @paperclipai/adapter-utils typecheck` — passed.
- `node --test scripts/acpx-patch-packaging.test.mjs
scripts/release-lib.test.mjs` — 10 passed.
- Full canary release dry run under Node 24.18.0 / npm 11.16.0 — passed
in an isolated scratch clone.
- `git diff --check` — passed during implementation verification.
- One-time GitHub Actions proof: [Ubuntu ACPX spawn
smoke](https://github.com/paperclipai/paperclip/actions/runs/29924348927/job/88937774579),
[Windows ACPX spawn
smoke](https://github.com/paperclipai/paperclip/actions/runs/29924348927/job/88937774558),
and [Canary Dry
Run](https://github.com/paperclipai/paperclip/actions/runs/29924348927/job/88937774497)
passed on head `f345ac69f2`; the dedicated smoke jobs are intentionally
not retained in the recurring PR workflow.
## Risks
- The ACPX stderr callback and env persistence exemption are carried as
a pnpm dependency patch until ACPX exposes/fixes those behaviors
upstream.
- Child stderr is synchronously appended to preserve ordering and
failure diagnostics; unusually high-volume agent stderr could briefly
block the Node event loop.
- The Windows-specific `.cmd` resolution and symlink `EPERM` branches
are proven by the standalone smoke test and the linked one-time
`windows-latest` run rather than a permanent CI gate.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- OpenAI GPT-5.4 via Codex CLI, medium reasoning, repository/tool
execution enabled; context-window size is not exposed in this session.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [ ] All Paperclip CI gates are green
- [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work
> - Governed MCP access spans contracts, runtime enforcement, adapters,
UI surfaces, and operator verification
> - The parity reference PR #9534 is too large for effective automated
or human review
> - The feature therefore needs a linear stack whose individual diffs
stay below the 100-file review limit
> - This pull request is split 1/8 and focuses on fixture and demo MCP
servers
> - The benefit is a standalone, testable review boundary while
preserving byte-for-byte parity at the top of the stack
## Linked Issues or Issue Description
- Related parity reference: #9534
- Problem: Developers need deterministic local MCP fixtures and visible
demo servers without pulling in the governed production runtime.
- Proposed solution: Adds the Google Sheets and KV demo MCP packages,
fixture catalog/servers, smoke harness, guide, and the root
smoke/typecheck registration hunks.
- Alternatives considered: keeping #9534 as one 403-file review, or
rewriting the feature to manufacture seams; both were rejected in favor
of path extraction plus compile-driven boundary moves.
- Roadmap alignment: this advances the existing governed MCP/tool-access
work already represented by #9534; it does not introduce a separate
roadmap initiative.
- Stack position: base branch is `master`.
- Merge policy: merge bottom-up, in order, only after the complete
eight-PR stack has been reviewed and the top-of-stack parity gate
remains empty.
- Requested review: QA for fixture and smoke coverage; Greptile on every
PR.
## What Changed
- Adds the Google Sheets and KV demo MCP packages, fixture
catalog/servers, smoke harness, guide, and the root smoke/typecheck
registration hunks.
- Keeps this PR below 100 changed files and independently typecheckable.
- Preserves the final tree from #9534 when combined with the other seven
stack levels.
## Verification
- `pnpm typecheck`
- `pnpm --filter @paperclipai/google-sheets-mcp-server test` — 27 tests
passed
- `pnpm --filter @paperclipai/kv-demo-mcp-server test` — 12 tests passed
## Risks
- The new packages add dependencies that are intentionally not committed
to `pnpm-lock.yaml`, per repository policy.
- Stack risk: merging out of order can expose incomplete layers;
mitigate by following the documented bottom-up merge policy.
- Parity risk: later edits to an intermediate branch can drift from
#9534; mitigate by re-running the empty top-of-stack diff before merge.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- OpenAI Codex, exact model ID `gpt-5.4`; runtime-managed context
window; medium reasoning with repository, shell, Git, GitHub CLI, and
code-execution tools enabled.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] Internal references are omitted except the execution-plan link
explicitly required for this coordinated split stack
- [x] My branch name describes the change and contains no internal
Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [ ] All Paperclip CI gates are green
- [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
## Stack Coordination
- Internal execution plan:
[PAP-13874](/PAP/issues/PAP-13874#document-plan)
- Parity reference: #9534
- Stack: #9556 → #9557 → #9558 → #9559 → #9560 → #9561 → #9562 → #9563
- Merge bottom-up only after full-stack review and an empty parity diff
at #9563.
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
Dotta
Nicky Leach