PaperClipAI/packages/paperclip-runner

Paperclip Native Runner

This package is the standalone development boundary for Paperclip's native runner protocol, process supervision, durable transport, provider drivers, and normalized session backends. Rust owns the production runner under runner/; TypeScript provides the control-plane reference, browser SDK, scenario tools, and conformance oracle.

The package includes one coherent set of capabilities: PRP v1 validation and replay, a supervised local runner with a scripted fake harness, durable WebSocket delivery and recovery, a skillless Codex app-server driver, live session and issue-thread surfaces, a public browser/React SDK, a standalone adapter demo, and a deterministic mock control plane. None of these surfaces imports or starts Paperclip's server, UI, CLI, or production database.

Public package surfaces

• @paperclipai/paperclip-runner — production contracts, clients/backends, PRP validation/replay, canonical catalog/dispatcher, and compatibility check.
• @paperclipai/paperclip-runner/testing — deterministic mocks plus PRP and semantic conformance kits. Tests and external conformance consumers import this explicitly.

The package root has no mock or scenario exports, and the workspace has no separate eval-package importer. Provider-backed eval campaigns remain deferred. See ADR 0001.

The two conformance surfaces intentionally prove different contracts. The existing runControlPlanePortConformance suite checks narrow PRP run/event persistence. CAPABILITY_HIGH_RISK_SEMANTIC_VECTORS and runSemanticConformanceKit compare normalized tool authorization, state, effects, audit, retries, conflicts, redaction, continuation, and terminal decisions. The production adapter stays App-owned and invokes Paperclip's real route/service authorities; it does not copy those rules into this package.

Quick start

The package also builds paperclip-runner-acpx-sidecar. This bounded v2 stdin/stdout bridge admits the qualified Codex ACPX profile only. It validates the exact model, session identity, tool catalog, structured input, and terminal settlement at the process boundary. Runnerd and the server do not select this sidecar in this slice. Other ACPX agents remain unavailable.

The Rust core includes a bounded client for this sidecar protocol. It enforces request identity, event order, frame and queue limits, timeouts, redacted diagnostics, and process-group cleanup. This transport remains package-local. It does not change runnerd provider selection in this slice.

Before a later provider adapter consumes a valid sidecar event, the Rust core also requires its optional or mandatory run and turn scope to match the active execution. Process and diagnostic events can remain global. All operational, tool, input, permission, and terminal events require the exact active binding.

A package-local payload boundary decodes events only after that scope check. It validates control identities, terminal status, question sets, and the admitted runtime event types and bounded fields. It redacts diagnostic and retained event values again before they can enter provider state.

Validated ACPX runtime events normalize into the same provider-neutral activity families as the direct Codex transport. Reasoning contents stay private. Tool targets are resolved within the workspace under the provider host's path semantics and receive a versioned sidecar boundary marker before becoming bounded, display-only PRP safe paths. Raw or unmarked provider locations fail closed. URI-scheme and Windows drive-shaped values require a separate sidecar attestation backed by an existing in-workspace entry or, for a not-yet-created edit target, an existing in-workspace parent. This preserves real POSIX colon filenames without treating arbitrary URI text as a path. Windows separators are canonicalized, and consumers must not reinterpret the display value as file-access authority. Operational semantic-result and terminal events remain reserved for the stateful adapter rather than being duplicated.

The package-local ACPX provider reducer preserves that order while it tracks one active turn, bounded assistant text, semantic results, and pending tool or input correlations. Terminal events flush the final assistant message first and clear unresolved turn-scoped requests. This reducer still does not select ACPX in runnerd.

The package-local session bootstrap starts the bounded sidecar transport, verifies the Codex-only capability handshake and effective model, opens one identity-bound session, and confirms its run attachment. Any failed bootstrap terminates the process; session shutdown preserves persistent provider state. The session can then start one immutable-workspace turn, request interruption, and reduce polled events through the scope-first state boundary. A mismatched command acknowledgement or invalid event terminates the session fail closed. Polled semantic calls pass through the run-scoped authorized tool bridge before they can be returned to a caller. Before a follow-up turn releases settled tool receipts, runner-core suspends and reaps the idle sidecar/provider generation, then resumes the same verified persistent identity in a fresh generation. This prevents a late session-lifetime MCP callback from inheriting the next turn's event authority.

The Rust question-response validator checks the versioned response envelope against the exact persisted question IDs, answer modes, options, required answers, custom-answer policy, and text constraints before provider delivery. Tool results and structured question responses then use two-phase resolution: validate retained identity and schema, require the exact sidecar acknowledgement, and only then clear pending local state. Codex permission requests violate its pinned sidecar policy and terminate the session fail closed. Safe suspension is available only with no active turn or pending request. The sidecar must return the exact persistent session identity before runnerd terminates the local process. Already validated ACPX reducer events project into provider-neutral durable events only with an exact run, session, turn, and item binding. Raw sidecar envelopes and permission requests are not admitted at this boundary. A safely suspended session can be recorded as a bounded private checkpoint. The checkpoint binds the exact provider identity, run, catalog revision, and catalog digest and is replaced atomically before a later recovery attempt. Recovery releases the stored identity only after those bindings match the prospective session configuration exactly.

Run the complete contract gate with:

pnpm install --filter @paperclipai/paperclip-runner --lockfile=false --offline --ignore-scripts --dev
pnpm --filter @paperclipai/paperclip-runner verify

The verification command requires a stable Rust toolchain with cargo on PATH, in addition to Node.js 24.11+ and pnpm 9+.

Minimal Debian/Ubuntu hosts without root access can extract the required Playwright browser libraries into a user-owned cache and run the same acceptance sequence with:

pnpm --filter @paperclipai/paperclip-runner verify:rootless

The tracer's final line is stable:

{"schemaVersion":"paperclip.runner.conformance.output.v1","runIdentity":{"runId":"run_conformance_0001","sessionId":"session_conformance_0001"},"result":{"status":"succeeded","summary":"Standalone Conformance fixture accepted."}}

Run only the tracer with:

pnpm --filter @paperclipai/paperclip-runner trace:conformance

Replay the Replay happy path, run a Local session, or open the browser devtool:

pnpm --filter @paperclipai/paperclip-runner replay:fixture
pnpm --filter @paperclipai/paperclip-runner trace:local-runner -- --scenario happy-path
pnpm --filter @paperclipai/paperclip-runner trace:codex
pnpm --filter @paperclipai/paperclip-runner demo:live-console -- --host 127.0.0.1 --port 4174

# Live console: chat with a live session in the browser.
pnpm --filter @paperclipai/paperclip-runner console:live-console
pnpm --filter @paperclipai/paperclip-runner browser:dev --host 127.0.0.1 --port 4179

# SDK: open the public-SDK reference console and mini consumer.
pnpm --filter @paperclipai/paperclip-runner console:sdk

# Standalone: run the standalone legacy/native/kill-switch tracer and page.
pnpm --filter @paperclipai/paperclip-runner trace:standalone
pnpm --filter @paperclipai/paperclip-runner trace:standalone -- --feature-flag enabled
pnpm --filter @paperclipai/paperclip-runner trace:standalone -- --feature-flag enabled --kill-switch enabled
pnpm --filter @paperclipai/paperclip-runner demo:standalone

Live console provider-backed routes are loopback-only and reject wildcard/LAN binds. Browser mutations require same-origin Fetch Metadata, matching Origin, and JSON content; see the protocol-server tutorial for direct curl examples.

Package-owned commands

Command	Purpose
build	Compile the TypeScript public surface, Rust workspace, and browser devtool.
typecheck	Check TypeScript, Rust, generated schema sources, and browser types.
test	Run Rust/TypeScript fixture, supervisor, fake-driver, live/replay, and boundary tests.
check:forbidden-imports	Reject TypeScript imports and Cargo path dependencies that cross into Paperclip core.
check:tracked-imports	Reject tracked imports and package.json entry points that only resolve against untracked files, so a clean checkout of any commit builds.
check:numbered-milestones	Reject numbered construction-milestone names in tracked package paths and source.
check:package-boundaries	Enforce the acyclic runtime/testing dependency and manifest boundary.
check:clean-consumers	Pack the runner and install its root and testing exports in a clean consumer.
check:conformance-parity	Require byte-for-byte equivalent Rust and TypeScript tracer output.
check:replay-goldens	Require all reducer snapshots and cross-language summaries to match checked goldens.
check:replay-parity	Run TypeScript and Rust against the same Replay fixture summaries.
check:browser-tokens	Reject component-local visual literals and require the standalone token layer.
docs:validate	Validate local documentation links.
trace:conformance	Run the Rust mock-core tracer, print the stable result, and exit.
trace:conformance:typescript	Run the TypeScript reference tracer directly.
replay:fixture	Validate and reduce a fixture to a final snapshot.
trace:local-runner	Run one native local session through the Rust runner and fake harness.
trace:codex	Run the mock core with a real, local skillless Codex app-server session.
demo:live-console	Start the package-local HTTP/SSE server with server-only Codex authentication.
console:live-console	Start the standalone browser devtool with the Live console on 127.0.0.1:4180.
console:sdk	Start the public-SDK reference console and mini consumer on 127.0.0.1:4181.
test:sdk	Run targeted browser-client, reducer-projection, and React component contract tests.
test:browser:sdk	Exercise both consumers with the fake driver, keyboard/a11y checks, reconnect/replay, measurements, and screenshots.
record:sdk:codex	Run both public consumers against a safe real Codex session and capture live screenshots.
check:capability-contract	Verify the generated capability, legacy MCP, and eval traceability contract.
check:semantic-contracts	Verify the provider-neutral semantic tool contract is current.
trace:live-runner	Run the real runnerd/Codex semantic loop against the mock control plane.
demo:scenarios	Start the Capability scenario explorer over the mock control plane on 127.0.0.1:4183.
console:issue-thread	Start the Paperclip-style issue thread on 127.0.0.1:4184.
test:scenarios	Run the scenario index, run-artifact, parity, explorer component, and route tests.
test:browser:scenarios	Exercise both the scenario explorer and issue-thread browser contracts.
browser:dev	Start the standalone live/replay browser devtool.
test:browser	Exercise static replay and live scenarios, then capture temporary screenshots under ignored test output.
verify	Run the complete deterministic Conformance through SDK acceptance sequence.
verify:rootless	Extract Debian/Ubuntu browser libraries without root, then run verify.

Navigate

• Architecture and dependency boundary
• ADR 0001: runner and testing package boundaries
• Tutorial index
• Conformance hand-run tutorial
• Replay hand-run tutorial
• Local runner hand-run tutorial
• Local protocol reference
• Durable transport reference
• Codex skillless Codex tutorial
• Codex skillless Codex driver reference
• Live console protocol/server tutorial
• Live console protocol/server reference
• Live console tutorial
• Live console reference
• SDK console tutorial
• SDK browser SDK reference
• SDK component decision record
• Capability semantic catalog and authorization
• Capability live runnerd/Codex loop
• Capability issue-thread UI
• PRP compatibility/versioning policy
• Adding a harness and permission-mode requirements
• PRP v1 expressiveness audit
• Cumulative end-to-end tutorial

Codex adds the package-local real-model reference driver, Live console adds the package-local browser console, and SDK extracts a reusable public SDK plus two standalone consumers. Runtime production Paperclip integration remains deferred; the App-owned production conformance adapter is test-only.

The SDK reference console opens in direct chat mode. Enter a normal prompt, then open the protocol inspector to review events and reducer state. Expand a Terminal row and its nested Debug details disclosure to inspect every canonical event retained for that command. The header marker 🖇️ v0.1.2 identifies the current console iteration.