Michał Pierzchała
05a1d76f2e
* test: gate daemon RPC wire compatibility against the last released tag (#1432) ADR 0006 fixes exactly when DAEMON_RPC_PROTOCOL_VERSION must be bumped, and nothing checked that it was. The runtime guard (readRemoteDaemonHealth) refuses a mismatched peer, but only fires when someone remembered the bump — a wire change that skipped it left both sides advertising protocol 2 while parsing different payloads, which is the failure ADR 0006 exists to prevent. Local daemons cannot skew (isReusableDaemonInfo takes over on any package version mismatch). Cross-machine is skewed by design — proxy, cloud/limrun, a remote macOS host — and ADR 0006 explicitly rules package version out as the compatibility gate there, so the one boundary where skew is intended was the one boundary with no gate. test/wire-compat/surface.ts declares the wire surface grouped by the ADR bullet each group serves, quoting it, with an `uncovered` note where a bullet is only partly digestible (the /health and /rpc literals inside http-server.ts stay reviewer-owned: a moved route 404s at connect time rather than misparsing). ledger.json records what each declaration hashes to, at which protocol version. Two gates, split for the same reason the replay-compat corpus splits: - unit-core holds the ledger to its source and prints the digest to paste; - Released-Surface Compatibility reads the ledger at the last RELEASED tag and requires the drift since then to carry a bump or a compatibleChanges ack. From one commit a bumped ledger and an unbumped one are both just an edited file, so only a released baseline can tell them apart. Acks are keyed by the digest they cover, so one "added an optional field" cannot launder later changes. Digests ignore comments and formatting; the manifest's closure is derived from the AST, so a field typed by an unlisted sibling fails rather than sitting outside the gate. CI cost: one added job (checkout + toolchain + two node scripts, ~1 min), mirroring the existing full-history replay-compat job. * test: close wire-surface overclaim and make the closure fail closed (#1432) Addresses both review P1s on #1717. P1 — the manifest materially overclaimed ADR 0006 coverage. It quoted all four bullets while digesting only the payload TYPES, so the producer and consumer seams could break a skewed peer without moving a listed digest. Now listed on both sides of every boundary: JSON-RPC method sets and the projections that turn each method's params into a DaemonRequest, createRpcError/sendJson/ writeRpcResponseEnvelope, resolveToken and the auth-hook types, upload preflight/finalize/308 handlers and the resumable ticket shape, artifact route and download/inventory framing, REST error mapping, and the client's own payload builder, lease-method mapping, response parser and error projection. 57 -> 117 declarations. What stays out is now named rather than implied: createDaemonHttpServer's dispatch wiring and the /health and /rpc literals inside it. Everything it dispatches WITH is digested individually, and a moved route 404s at connect time rather than misparsing — the loud failure, not the silent one. P1 — imported and re-exported payload shapes escaped the closure. declarationHomes() scanned only the manifest's own files and the walk continued silently when a name could not be placed, so a listed type could gain foo?: ImportedShape from a new module and stay green. Resolution is now explicit and fails closed: relative imports, workspace specifiers (through the owning package's own exports map, so a re-pointed export cannot drop a type), and facade re-export chains. Every referenced name must land on a listed declaration, a waiver with a written reason, a declared external module, or the TS/Node global set. Fixed two extractor blind spots the walk exposed: a declaration's own generic parameters and `as const` were being reported as references. Planted-red proofs (wire-mutations.test.ts): 13 cases independently mutate method naming, response serialization, response parsing, auth projection, upload ticket shape, 308 framing, artifact framing, REST error mapping, and progress framing, each asserting the digest moves; 3 probes prove the closure really reaches across a package boundary, a facade re-export, and a plain relative import. Mutations apply inside the declaration's own span — a whole-file replace silently hit a sibling sharing the substring, which is how the first draft of one case passed vacuously. The largest waiver pair (InternalRequestOptions, CommandFlags) rests on ADR 0006's own additive rule: they reach the peer inside DaemonRequest's untyped flags/input bags, and the decision says a new flag needs no bump. Digesting them would fire the gate on every new CLI flag and train reviewers to rubber-stamp acks. * test: list the consumer half of the auxiliary HTTP boundaries (#1432) Addresses the remaining review P1 on #1717. The manifest claimed both sides of response/upload/artifact framing while listing nothing from upload-client.ts, daemon-artifacts.ts, or the health consumer in daemon-client-transport.ts, so those parsers could narrow without moving a listed digest or protocol 2. Now listed (117 -> 141 declarations): - /health consumer: RemoteDaemonHealth, readHealthPayload, readDaemonHttpHealth, readRemoteDaemonHealth. This is the sharpest of the three — narrowing the reader or the comparison disables the very refusal ADR 0006 exists to guarantee, and nothing else in the repo would notice. - /upload consumer: UploadResponse, UploadPreflightResponse, UploadPreflightResult, parseUploadPreflightResult, requestUploadPreflight, uploadDirectArtifact, tryDirectUploadWithResume, shouldRetryDirectUpload, finalizeDirectUpload, uploadLegacyArtifact, ARTIFACT_HASH_ALGORITHM, isStringRecord, and PreparedUploadArtifact — whose sha256/sizeBytes/fileName/artifactType/ contentType fields ARE the preflight body the daemon parses. - /artifacts/* consumer: DaemonArtifactEndpoint, buildDaemonArtifactUrl, isRemoteDaemon, DownloadRemoteArtifactParams, downloadRemoteArtifact, materializeRemoteArtifacts, resolveMaterializedArtifactPath. Running the closure fail-closed over the new files surfaced three more stops, each decided rather than skipped: PreparedUploadArtifact listed (it is payload), UploadProgressSink waived (client-local rendering, never leaves the process), and src/daemon/types.ts#DaemonArtifact waived as a re-export alias of the listed kernel type, matching its DaemonRequest/DaemonResponse siblings. 10 more planted-red mutations cover the new seams: health version-read and mismatch-refusal defeated, RemoteDaemonHealth field dropped, preflight parser narrowed, preflight/legacy response shapes narrowed, finalize body key renamed, ticket field renamed, artifact tenant header dropped, artifact URL moved. A fourth closure probe proves the upload-consumer files are genuinely reached by the walk rather than merely listed. 22 -> 33 tests. The README now states the coverage as a producer/consumer table per boundary, so the claim is checkable at a glance instead of asserted in prose. * test: list the client half of the resumable 308 contract (#1432) Addresses the third review P1 on #1717. Listing the daemon's handleResumableUpload proved it still PRODUCES 308; nothing proved the client still CONSUMES the released one. src/remote/upload-stream.ts owns that half and was entirely outside the manifest, so a newer client could stop accepting `upload-offset`, change how it reads `Range: bytes=0-N`, or emit a different resumed `Content-Range` without moving one of the 141 listed digests. Now listed (141 -> 151): UploadStreamResponse, streamFileToHttpRequest, streamFileToHttpRequestAttempt, buildUploadRequestHeaders, isUploadResumeStatus, isUploadRedirectStatus, parseUploadResumeOffset, parseNonNegativeIntegerHeader, firstHeaderValue, MAX_UPLOAD_REDIRECTS. streamFileToHttpRequestAttempt is listed despite its size, unlike createDaemonHttpServer which stays in `uncovered`. The distinction is stated at the declaration: the HTTP server only dispatches to handlers that are each digested, while the attempt loop IS the resume state machine — it decides whether a 308 continues the upload and what the next request carries, so its sequencing alone can break a released daemon while every helper keeps its digest. 6 new planted-red mutations prove the client half moves the ledger: a dropped `upload-offset` fallback, narrowed Range parsing, a changed resumed Content-Range, 308 no longer treated as continue, a narrowed UploadStreamResponse, and dropped header-value coercion. 33 -> 39 tests. Closure fail-closed surfaced two more stops: UploadStreamProgressOptions waived (local byte-progress rendering) and URL/URLSearchParams added to the global set. README now carries a `/upload` resume row in the producer/consumer table, and names the pattern behind three rounds of review: the coverage sentence kept getting written ahead of the coverage, so the table and the `uncovered` notes are the claims to trust — they are checkable against surface.ts, prose is not. --------- Co-authored-by: Claude <noreply@anthropic.com>
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ADR 0006: Daemon RPC Protocol Version
Status
Accepted
Context
agent-device can run a client on one machine and reach a daemon on another machine through the
HTTP JSON-RPC transport, including agent-device proxy in front of a local macOS daemon. Client and
remote host package versions can differ. Many version skews are safe because the client sends a
stable command request envelope and the daemon executes only the requested command.
Package semver is too strict for this boundary: a 0.15 client and 0.17 remote daemon can often interoperate. At the same time, the client needs a cheap way to fail before sending command RPC when the transport protocol itself is no longer compatible.
Decision
The daemon HTTP /health payload advertises a rpcProtocolVersion integer alongside service and
package version metadata. Remote clients compare this value before sending JSON-RPC requests.
Package version is diagnostic only and must not be used as a compatibility gate. Missing
rpcProtocolVersion is treated as a legacy remote daemon and is allowed unless a later security or
protocol decision explicitly retires legacy compatibility.
rpcProtocolVersion changes only when an older client and newer daemon, or newer client and older
daemon, cannot safely communicate over the HTTP RPC boundary for existing commands. Bump it for
breaking changes to:
- HTTP route requirements for
/health,/rpc,/upload, or/artifacts/*. - Authentication semantics required to authorize RPC, upload, or artifact requests.
- JSON-RPC envelope shape, method naming, request id handling, or command request projection.
- Response, error, artifact, upload, or progress-stream framing that existing clients parse.
- Existing command request or response contracts when the old side would misinterpret the payload rather than fail clearly.
Do not bump it for additive changes:
- New commands.
- New optional request fields or flags that older daemons can ignore or reject with a normal command error.
- New optional response fields that older clients can ignore.
- Package version changes, refactors, or implementation-only daemon/proxy changes.
When a single command needs finer-grained compatibility in the future, prefer command-level feature or capability metadata over bumping the whole RPC protocol, unless the shared transport contract is also affected.
Alternatives Considered
- Gate by package version: simple, but rejects compatible version skew and makes proxy usage brittle across frequent releases.
- Do not check compatibility: maximizes compatibility but fails later, after the client has sent an RPC payload that a remote daemon may parse incorrectly.
- Full schema negotiation: more precise, but too much machinery for the current JSON-RPC boundary.
Consequences
Protocol-breaking changes must update DAEMON_RPC_PROTOCOL_VERSION, tests that assert /health
metadata, and at least one remote-client regression test that proves mismatched protocols fail before
command RPC.
The bump rules above are enforced rather than remembered (#1432). test/wire-compat/surface.ts
declares the wire surface grouped by the bullets in this decision, and test/wire-compat/ledger.json
records what each declaration hashes to and at which protocol version. The unit lane fails when a
declaration's shape moves without the ledger following, and pnpm check:daemon-wire-compat compares
the ledger against the last released tag: drift since that release must carry either a bump or a
compatibleChanges acknowledgment invoking the additive list above. Where a bullet is only partly
digestible — the /health and /rpc path literals inside http-server.ts — the manifest records
the gap and its reason instead of implying coverage. See test/wire-compat/README.md.
Legacy remote daemons without rpcProtocolVersion remain reachable. This keeps the first release of
the proxy compatible with older HTTP daemons, but it means absence of the marker is not proof of
compatibility.