feat(diff): deep-diff the no-team bucket

[robbiet480]

Closes #41.

Summary

The no-team bucket was informational only — fleet-plan printed 2 policies, 2 scripts configured (no API diff available for hosts on no team) and moved on. A changed policy or a removed script in fleets/unassigned.yml produced no diff at all. Now it diffs like any other team.

Correcting the issue's premise

The issue says "the API client already accepts teamID=0". It accepts the value, but teamID 0 meant omit the filter — which returns every team's resources, not the no-team bucket's. Probed against production Fleet:

Request	Result
GET /teams/0/policies	{policies: 2, inherited_policies: 44} ← the bucket's own 2, plus the global ones it inherits
GET /global/policies	{policies: 44} ← a different set
GET /configuration_profiles?team_id=0	1 profile (matches unassigned.yml)
GET /scripts?team_id=0	2 scripts (matches)
GET /software/titles?team_id=0	0 titles
GET /queries?team_id=0	50 — same as unfiltered; Fleet has no no-team query scope

So GetProfiles, GetScripts, and GetSoftware now always send team_id. No caller passed 0 to them previously, so this only enables the new path. Policies get a dedicated GetNoTeamPolicies that hits /teams/0/policies and drops inherited_policies — a no-team file does not own the global policies it inherits.

Changes

• internal/api — FleetState.NoTeam holds the bucket. FetchAll now takes a FetchOptions{Global, NoTeam} struct rather than a variadic bool (a second bool flag would have been unreadable at the call site). Each no-team fetch degrades to an "unavailable" flag on 403/404, matching how per-team resources already behave under a gitops-scoped token.
• internal/diff — diffNoTeam diffs policies, profiles, and scripts. When the bucket was not fetched, it falls back to the old summary, so older servers and unfetched runs behave exactly as before.
• cmd/fleet-plan — requests the bucket only when the repo actually has a no-team file, since it costs 3 extra API calls.

Deliberately not diffed

Software. Fleet reports configured software only through the teams list, which excludes no team. Rather than reporting every configured package as an addition, the diff says so explicitly:

software diff skipped: N software items configured, but Fleet does not report
software for hosts on no team

Reconstructing it from /software/titles?team_id=0 plus per-title detail calls is possible but is its own piece of work — happy to file a follow-up if you want it.

Queries. Fleet scopes queries to a real team or to the global scope; a no-team file cannot define them.

Test plan

• go build ./..., go vet ./..., go test -race ./... — pass
• golangci-lint run — 0 issues
• Coverage: api 82.9%, diff 83.4% — above the floor
• New tests: TestGetNoTeamPolicies (asserts inherited_policies are dropped), TestFetchAllNoTeam (asserts team_id=0 is actually sent), TestFetchAllNoTeamPermissionErrors, TestDiffNoTeamDeepDiff, TestDiffNoTeamUnavailableResources (nothing reported as added when the API side is unreadable), TestDiffNoTeamSoftwareIsReportedAsSkipped. The existing TestDiffNoTeamIsNotANewTeam still covers the fallback path.
• Validated against the live Fleet instance with the production fleet-gitops repo: the real no-team file now diffs clean where it previously printed the informational line, and a modified copy reports exactly what changed:

Team: Unassigned
  Policies:
    ~ macOS - RingCentral uninstalled
        query: "...M apps WHERE bundle_iden..." → "...M apps -- changed for te..."
  Scripts:
    - uninstall-ringcentral.ps1

Summary by CodeRabbit

• New Features

  • Added support for retrieving and comparing resources assigned to hosts without a team.
  • Added no-team policy, profile, and script diff results with permission-aware availability reporting.
  • Added baseline comparisons that recognize equivalent “No team” and “Unassigned” resources.
  • No-team software and query comparisons are clearly reported as skipped when Fleet provides no comparable state.

• Documentation

  • Documented no-team API endpoints, resource retrieval, and diff behavior.

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Walkthrough

The change adds conditional no-team state fetching, explicit team_id=0 resource requests, permission-aware availability tracking, and deep diffs for no-team policies, profiles, and scripts. No-team software and queries remain skipped.

Changes

No-team bucket deep diff

Layer / File(s)	Summary
No-team scope and state contracts cmd/fleet-plan/main.go, internal/api/client.go, docs/API-Endpoints.md, docs/Architecture.md, cmd/fleet-plan/cmd_test.go, internal/api/client_test.go	The CLI detects no-team configuration and passes structured fetch options. Fleet state models optional no-team resources. Documentation and tests define the team-zero scope and supported resources.
No-team API state and fetching internal/api/client.go, internal/api/client_test.go	The API fetches team-zero policies, profiles, and scripts concurrently. Policy pagination, script enrichment, explicit team_id=0 parameters, permission flags, and fatal-error handling are covered.
No-team resource diffing and validation internal/diff/differ.go, internal/diff/differ_test.go	The diff engine compares supported no-team resources, subtracts baseline changes by parser identity, reports unavailable resources, and skips unsupported software and queries.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Merge Risk: 🟡 Moderate · up to 5dd56

No-team diffs currently bypass baseline subtraction, so changes already present in the target state may be reported as new changes in CI, creating misleading plans and potentially unnecessary remediation; this correctness issue should be fixed or explicitly accepted before merge.

Sequence Diagram(s)

sequenceDiagram
  participant runDiff
  participant ClientFetchAll
  participant FleetAPI
  participant DiffNoTeam
  runDiff->>ClientFetchAll: Request configured no-team state
  ClientFetchAll->>FleetAPI: Fetch team 0 policies, profiles, and scripts
  FleetAPI-->>ClientFetchAll: Return resources or permission errors
  ClientFetchAll-->>DiffNoTeam: Provide FleetState.NoTeam
  DiffNoTeam-->>runDiff: Report no-team diffs or skipped resources

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Possibly related PRs

• CampusTech/fleet-plan#37: Both changes modify no-team detection and diff behavior.

Suggested reviewers: ads-0x1, isaacramirez-2, troutowicz

Poem

I’m a rabbit with a team-zero plan,
Fetching each resource as fast as I can.
Policies and scripts hop into view,
Profiles join the diffing crew.
Software rests beneath the moon. 🐇

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	The PR implements policies, profiles, and scripts, but it does not deep-diff the queries and software required by issue #41.	Implement no-team query and software diffs, or update issue #41 to explicitly accept their documented exclusion.
Docstring Coverage	⚠️ Warning	Docstring coverage is 56.25% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the primary change: deep-diffing the no-team bucket.
Description check	✅ Passed	The description includes Summary, Changes, and a completed Test plan, but it omits the Invariants section.
Out of Scope Changes check	✅ Passed	The API, diff, command, documentation, and tests support the no-team deep-diff objective and do not introduce unrelated changes.

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Codecov Report

❌ Patch coverage is 95.76271% with 5 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
internal/diff/differ.go	94.00%	3 Missing ⚠️
internal/api/client.go	96.61%	1 Missing and 1 partial ⚠️

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Actionable comments posted: 2

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Inline comments:
In `@internal/diff/differ.go`:
- Around line 182-221: The no-team path in diffNoTeam must apply baseline
subtraction when WithBaseline is enabled. Locate the baseline entry using
parser.IsNoTeam rather than matching its display name, compute baseline policy,
profile, and script diffs for that entry, and subtract them from the current
no-team results before reporting. Add a regression test covering previously
merged but undeployed no-team changes in a CI baseline diff.
- Around line 211-217: Handle no-team queries and reports explicitly: either
reject entries parsed into ParsedTeam.Queries during parsing or make diffNoTeam
emit a clear skipped-query warning because api.NoTeam cannot represent query
scope. Add tests covering both the parsing/diff behavior and the resulting
rejection or warning.

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