feat(agents): record which GitHub commit a deployment is running [ASTD-604] - #2009
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📝 WalkthroughWalkthroughDeployment creation and staging now capture specification revisions and tracked references. The metadata is stored on ChangesSpecification revision tracking
Suggested reviewers: Sequence Diagram(s)sequenceDiagram
participant DeploymentAPI
participant AsyncFilesClient
participant stage_with_spec_revision
participant DeploymentBackend
participant _start_deployment
participant AgentDeployment
DeploymentAPI->>AsyncFilesClient: read current fileset revision
DeploymentAPI->>AgentDeployment: create deployment with revision fields
DeploymentBackend->>stage_with_spec_revision: stage agent specification
stage_with_spec_revision->>AsyncFilesClient: compare fileset revisions
stage_with_spec_revision-->>DeploymentBackend: return staged files and SpecRevision
DeploymentBackend->>_start_deployment: return staged_spec
_start_deployment->>AgentDeployment: persist revision metadata
Priority: ⬇️ Low Change: Feature Merge Risk: 🟡 Moderate · up to Deployment provenance can name a different revision from the content actually staged, which can produce incorrect stale-deployment decisions. Add atomic revision pinning before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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In `@plugins/nemo-agents/src/nemo_agents_plugin/api/v2/dependencies.py`:
- Line 20: Update the files-client adaptation around client_from_platform in the
dependency setup so adapter exceptions are handled best-effort instead of
escaping and preventing create_deployment from running. Preserve deployment when
adaptation fails, matching the optional behavior of spec_revision._files_client.
In `@plugins/nemo-agents/tests/unit/test_spec_revision.py`:
- Line 68: Update the revision handling around stage() so a revision changing
after the retry is not accepted as provenance: when settled differs from after,
return empty provenance or retry/fail instead of returning settled. Update the
assertion in test_spec_revision to require the rejected behavior.
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Only a Fabric agent stages its Ethos fileset, but the create path read one for every deployment. A fileset can outlive the agent it belonged to, so a NAT deployment sharing that name reported a revision it was not running — the runner never stages for it, so nothing overwrote the value afterwards. Suggested in review on #2009. Signed-off-by: mschwab <mschwab@nvidia.com>
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In `@plugins/nemo-agents/src/nemo_agents_plugin/runner/deployments_backend.py`:
- Line 705: Update both call sites of stage_with_spec_revision in
deployments_backend.py and in_memory.py to pass the local AsyncNeMoPlatform sdk
instead of files_client. Preserve the existing staging flow while ensuring
revision tracking and refresh-aware restaging receive the correct SDK type.
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`AgentDeployment` gains `spec_revision` and `spec_tracked_revision`: the revision its spec fileset resolved to, and the mutable ref that revision was resolved from. Only a Fabric agent stages that fileset, so no other deployment format reads one — a fileset can outlive the agent it belonged to, and a same-named one would otherwise report a revision the deployment is not running. Both runner backends download the fileset by name when they start a deployment, so a revision recorded once at create time is a claim, not a pin. A deployment restarted after a refresh — a controller restart is enough — restages the newer commit while the entity still names the old one, which is exactly when a client asking "up to date or behind?" needs the answer to be true. Staging therefore reports what it resolved, `DeploymentInfo` carries it, and the controller writes it on every start. `staged_spec = None` means the backend staged nothing, which is not the same as staging a fileset that pins no revision, so a non-Fabric deployment keeps the value it was created with. The download and the revision read are two calls, so a refresh landing between them would record a revision the deployment did not stage. Staging reads the revision either side of the download and stages again when it moved. If it moves a third time, nothing is recorded rather than a revision no pass produced — a wrong revision is worse than none for a client asking whether a deployment is stale. Pinning it outright needs a revision-aware download path, which the files service does not have. Reading a revision must never fail a deployment, so a files client that cannot be built costs the deployment its recorded revision and nothing else. Signed-off-by: mschwab <mschwab@nvidia.com>
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Inline comments:
In `@plugins/nemo-agents/src/nemo_agents_plugin/spec_revision.py`:
- Around line 92-93: Update the staging flow around read_spec_revision, stage,
and staged_spec to bind all downloaded files to one immutable fileset revision.
Add or use a Files service operation that resolves the revision, stages every
file from that revision, and returns its SHA; alternatively pin every staging
request to the resolved revision. Set staged_spec provenance from that returned
SHA, including on retries, rather than inferring it from before/after
mutable-ref reads.
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Summary
An agent can be deployed from a GitHub repository, and a repository moves. Until now a deployment did not record which commit it was actually running, so nothing could answer "is this agent up to date with its source?".
AgentDeploymentnow records the revision of the agent's source fileset it staged, and the mutable ref that revision came from.Changes
AgentDeployment.spec_revision/spec_tracked_revision— the immutable id staged (a GitHub commit SHA) and the ref it was resolved from (main). Both empty when the backend pins nothing, or when the fileset was created from an immutable id.spec_revision.py—read_spec_revisionandstage_with_spec_revision, shared by the deployment-create path and both runner backends. The tracked-ref rule is read from the storage config rather than restated here.DeploymentInfo.staged_spec, written onto the entity by the controller on every start.Why it is not recorded once at create time
Both runner backends download the agent's fileset by name when they start a deployment, so a revision captured once at create time is a claim rather than a pin. A deployment restarted after the fileset is refreshed — a controller restart is enough — restages the newer commit while the entity still names the old one. That is precisely when the answer needs to be true.
Staging therefore reports what it resolved, and the controller rewrites the fields on every start.
staged_spec = Nonemeans the backend staged nothing, which is deliberately distinct from staging a fileset that pins no revision, so a non-Fabric deployment keeps the value it was created with.Known limitation
The download and the revision read are two calls, so a refresh landing between them would record a commit the deployment did not stage. Staging reads the revision either side of the download and stages again when it moved, which is as close to atomic as the current download path allows.
Closing it properly needs the fileset download to accept or report a revision, so staging can pin what it downloads instead of observing it. That is a files-service change and is not in scope here.
Type of Change
Quality Gates
Verification
Signed-off-by:traileruv run pre-commit run -apasses, or any blocked checks are identified belowTargeted validation:
pytest plugins/nemo-agents/tests— 1497 passed. Excludestest_container.pyandtest_fabric_package_validation.py, which need adist/directory this checkout does not have; both files and thecontainer/source are untouched here.pytest services/core/files/tests— 669 passed, 51 skipped.ruff check/ruff format --check— clean.typasses via the pre-commit hook on every commit.uv run pre-commit run -a— not run in full.helm-docsis not installed here anduv-lockrequires uv 0.9.14 against 0.9.30 locally; both pass in CI. Every other hook runs on each commit.Run each test directory separately. Passing several to
pytestin one invocation silently collects only some of them —services/core/files/tests plugins/nemo-agents/testscollects 708 tests, which is the files suite alone. That is how a break in the runner tests went unnoticed while the combined command reported green.Closes ASTD-604. Part of ASTD-519.
Summary by CodeRabbit
New Features
Tests