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PaperClipAI/doc
Nicky LeachandPaperclip 2a5a323e57 Add execution-owned Runner launch preparation (#16997)
## Thinking Path

> - Paperclip manages work for AI agents.
> - Runner can execute in a different environment from Core.
> - Core owns provider selection, policy, and resource assignments.
> - The execution environment must prepare its own files and paths.
> - A shared contract must keep these responsibilities separate.
> - This PR adds that contract to the Runner execution driver.

## Linked Issues or Issue Description

**Problem or motivation**
Runner transport prepares provider files on the controller before
launch. An execution owner cannot prepare those files in its own
environment through the existing driver.

**Proposed solution**
Add `prepareLaunch` to the execution driver. Supply versioned Core
requirements. Accept a configuration ID, requirements digest, and
ordinary provider descriptor. Validate Core policy and assignments
before launch. Keep existing provider session checks.

**Alternatives considered**
Provider-specific ownership flags would spread the boundary across
backends. Shell preparation would expose process details in the plugin
API.

Refs #16993, #16977. Both prerequisites are merged. This PR now targets
master. Native plugin integration and execution-host preparation follow
separately.

PR #16978 contains an earlier, unmerged prototype. Its
`persistentAgentHome` mode and skill path-map call will be replaced by
this preparation contract before activation. This PR preserves current
master callers of the skill helper.

## What Changed

- Add the optional preparation callback and an explicit Runner artifact
identity.
- Keep the built-in preparation path as the default.
- Validate provider policy and resource assignment identity. Preserve
instruction text when resource locations change.
- Persist the attachment seed after an authority epoch rotation, so a
later controller restart can recover the same run.
- Preserve explicit context removal on a new run. Only an omitted
context can reuse the saved context. Remove its registered instruction
framing when context is removed.
- Save exact requirements and configurations in a private file outside
Runner commands. Retain the active record across failed attachments. Use
current grants for new runs. Keep incompatible session changes rejected.
- Join delayed preparation during startup and warm attachment cleanup.
Retain an unsettled checkpoint after a timeout. Prevent work after
cancellation.
- Use the supplied Runner artifact for interrupted handoff recovery.
Restore the exact target configuration at each handoff crash boundary.
Check the Runner state when the final ACK may be lost.
- Bind the changed shared sources to Copilot profile v51. Preserve the
v50 receipt and current integrity checks.

## Verification

- Workspace typecheck passed.
- All 487 affected Runner transport, control-plane, preparation store,
builder, policy, and profile tests passed on commit `eaf8ae8d1`.
- Workspace build and typecheck passed again on commit
`eaf8ae8d12c7ef2d22d226e4b3f05fdbf79ef4cb`.
- Both warm attachment cleanup regressions fail before the fix. They
pass after the fix. The tests cover delayed preparation, timeout
retention, and concurrent attachment rejection.
- The routed handoff regression fails with a missing controller binary
before the fix. It passes after the fix. The execution owner launches
the real fixture Runner.
- The 200,000-byte instruction regression fails before the fix and
passes after it. Four prepared handoff crash cases verify exact request
and configuration recovery. The store tests verify private file mode,
conflicting records, corrupt data, and active-run retention.
- A real Runner with a controlled fake provider verifies execution-host
paths, exact recovery, warm reuse, incompatible profile rejection, and
cancellation. It does not contact an external provider.
- The regression found undefined settings in strict PRP command hashing.
Requirements now contain only JSON values. The warm transition test
passes without changing PRP validation.
- The broader root suite on the prerequisite finished with 22,420
passing tests, seven failed tests in unchanged Git and diagnostic code,
and two suite setup errors because Cargo was absent from its PATH. This
PR does not claim a passing full root suite.
- The CI Build job passed compilation and production runtime boot, then
its runner received a shutdown signal during the clean public install
check. Other jobs reported lost communication with their self-hosted
runners. The failed jobs passed on retry on the same commit; successful
jobs kept their results.
- The current Superagent security scan is inconclusive because its
pinned merge-base checkout failed or timed out. GitHub rejected the
check rerun request through the available API. This is not a passing
security scan.
- Standard Greptile and Greptile Apex each returned 5/5 on `eaf8ae8d1`.
All review threads are resolved. CI passed on attempt 2. Current checks
have 55 successes, four optional skips, and the inconclusive security
scan described above. The branch is ready, mergeable, and current with
master.
- No live provider qualification or deployment was run.

## Risks

- A preparation owner must store configurations and keep retries bound
to the same task and requirements.
- Copilot source binding requires a new profile identity. This PR does
not claim fresh live qualification.
- The callback is an SDK extension. This PR does not connect it to a
plugin task process owner or add a Launcher endpoint.

## Model Used

- OpenAI Codex, GPT-6. Reasoning and repository tools. The exact serving
model identifier and context size are 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
- [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

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Co-authored-by: Paperclip <noreply@paperclip.ing>
2026-10-20 14:24:13 -07:00
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