docs(ci): generate Python/Rust API references at publish time - #13556
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The Python/Rust API reference pages are deterministic outputs of gen_python_api.py / gen_rust_api.py over the source tree. Committing them meant every source PR touching a documented symbol had to carry the regenerated MDX (the pre-merge freshness gate required it) and wait on docs codeowner review for a diff no human authored. Follow the releases.json/atom precedent (#13344): delete the committed pages, gitignore their directories (anchored at /pages/ so the synced .gitignore on docs-website cannot swallow the published snapshots), and generate at publish time instead: - fern-docs.yml preview/publish: generate both references against the exact ref being published, before the pages-dev rsync. - fern-docs.yml version tags: generate from the tagged source, skipping (never failing) older tags that still commit their pages. - pre-merge: run both generators in write mode so a source PR that breaks generation still fails fast; the fern-check job materializes the pages before fern check validates the nav. - The Kubernetes reference regenerates from a committed docs-side file, so it stays committed and keeps its --since-scoped freshness gate. Tests that diffed rendered output against the shipped tree now assert against a fresh render; suite is 205 passing. Signed-off-by: Dan Gil <dagil@nvidia.com>
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WalkthroughThe documentation workflows now generate Python and Rust API references during pre-merge checks, releases, and local website simulation. Kubernetes references remain freshness-checked. Generated Python and Rust pages are no longer committed, and tests validate rendered output directly. ChangesAPI reference generation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to Publish-time generation may overwrite committed API pages for legacy tags, which could make historical documentation snapshots incorrect. The tag-handling guard should be fixed before merging; the remaining guidance and test improvements are bounded follow-ups. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Warning There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure. 🔧 actionlint (1.7.12).github/workflows/fern-docs.yml
.github/workflows/pre-merge.yml
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In @.github/workflows/fern-docs.yml:
- Around line 739-755: Update the “Generate API references at the tag” step to
detect tracked Python and Rust API reference files before running either
generator; if either reference directory contains tracked pages, preserve those
committed pages and skip generation. Only install dependencies and invoke
gen_python_api.py and gen_rust_api.py when both generators exist and neither
reference directory is tracked.
In `@docs/fern/AGENTS.md`:
- Around line 30-40: Update the API-reference lifecycle guidance in the API
references section to state that only Kubernetes output is committed, while
Python and Rust pages remain publish-time artifacts. Revise the later --check
guidance so the pre-merge freshness gate applies only to the committed
Kubernetes output.
In `@docs/fern/scripts/tests/test_api_reference_regressions.py`:
- Around line 560-569: Strengthen the workflow assertions in the regression test
around the publish and fern-check generation steps by comparing their string
offsets, requiring API generation to occur before each consuming sync, snapshot,
or validation step. Keep the existing generator-specific assertions and ensure
the checks validate ordering rather than mere presence.
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📒 Files selected for processing (21)
.github/workflows/fern-docs.yml.github/workflows/pre-merge.ymldocs/fern/.gitignoredocs/fern/AGENTS.mddocs/fern/pages/reference/api/python/README.mdxdocs/fern/pages/reference/api/python/_core.mdxdocs/fern/pages/reference/api/python/common.mdxdocs/fern/pages/reference/api/python/frontend.mdxdocs/fern/pages/reference/api/python/health_check.mdxdocs/fern/pages/reference/api/python/llm.mdxdocs/fern/pages/reference/api/python/logits_processing.mdxdocs/fern/pages/reference/api/python/mocker.mdxdocs/fern/pages/reference/api/python/nixl_connect.mdxdocs/fern/pages/reference/api/python/planner.mdxdocs/fern/pages/reference/api/python/router.mdxdocs/fern/pages/reference/api/python/runtime.mdxdocs/fern/pages/reference/api/rust/README.mdxdocs/fern/scripts/simulate_docs_website.shdocs/fern/scripts/tests/test_api_reference_regressions.pydocs/fern/scripts/tests/test_gen_python_api.pydocs/fern/scripts/tests/test_gen_rust_api.py
💤 Files with no reviewable changes (10)
- docs/fern/pages/reference/api/python/mocker.mdx
- docs/fern/pages/reference/api/python/README.mdx
- docs/fern/pages/reference/api/python/health_check.mdx
- docs/fern/pages/reference/api/python/nixl_connect.mdx
- docs/fern/pages/reference/api/python/frontend.mdx
- docs/fern/pages/reference/api/rust/README.mdx
- docs/fern/pages/reference/api/python/router.mdx
- docs/fern/pages/reference/api/python/planner.mdx
- docs/fern/pages/reference/api/python/logits_processing.mdx
- docs/fern/pages/reference/api/python/runtime.mdx
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…ivot Review findings: - A code-only merge to main that changes a documented symbol never republished the docs (the publish job keyed only on the docs filter), leaving the live API reference showing the previous code. The job now also fires on api_docs changes for main pushes -- scoped to main so gated preview branches do not build a preview per source PR. - Tags cut with generators AND committed pages (post-#12110, pre-pivot) would have been regenerated at snapshot time, overwriting pages the tag froze and turning a generator error at the old ref into a release failure. Tracked pages now skip generation. - Two regression tests globbed the deleted tree and passed vacuously; they now assert against fresh renders (sphinx-role guard, blob/main self-link scan) with non-empty input asserted. - The workflow-contract test now pins generation BEFORE each consumer step (pages-dev sync, version snapshot, fern check), not mere step existence. - AGENTS.md: the committed/publish-time split now names the Kubernetes reference as the one committed, freshness-gated API page. Signed-off-by: Dan Gil <dagil@nvidia.com>
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Review findings addressed in 76c5d27:
Full docs suite re-run after the changes: 205 passed. /ok to test 76c5d27 |
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The docs-website-composition replay (a required check) runs simulate_docs_website.sh on a runner without griffe -- the script's new import guard would hard-fail every docs PR. Install the pinned griffe with Python 3.13 before the replay. fern-broken-links resolves the API landing's relative links through the file graph, so it too must materialize the publish-time pages before running the checker. Also update the API landing page's regeneration note, which still described the retired all-three --check contract. Signed-off-by: Dan Gil <dagil@nvidia.com>
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/ok to test 7178734 |
alec-flowers
approved these changes
Aug 19, 2026
dagil-nvidia
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…rence-publish-time Signed-off-by: Dan Gil <dagil@nvidia.com> # Conflicts: # docs/fern/pages/reference/api/python/frontend.mdx # docs/fern/pages/reference/api/python/planner.mdx # docs/fern/pages/reference/api/python/router.mdx
setup-python replaces the runner's system python3 (which bundles PyYAML) on PATH, so the replay's resolve_translation_links.py crashed on 'import yaml' right after API generation succeeded. Signed-off-by: Dan Gil <dagil@nvidia.com>
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CI triage on the last run: the composition replay failed because setup-python shadowed the runner's system PyYAML (fixed in 25527ec — the replay job now installs pyyaml with griffe); the lychee 404 (aisimulate/examples/sweeper) is resolved by merging main, where that path now exists; the rust-tests KV-router failure is unrelated to this docs/CI change. Merge conflicts with main (three regenerated pages vs. their deletion) resolved keeping the deletions. /ok to test 25527ec |
dagil-nvidia
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August 21, 2026 05:30
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Aug 27, 2026
Resolutions:
- docs/fern/pages/reference/api/python/{_core,llm,mocker}.mdx: accept main's
deletion. #13556 moved Python API reference generation to publish time, so the
regenerated pages this branch carried are obsolete rather than conflicting.
- kv_connector_protocols.py: keep both registry entries. Main added
NeuronNixlConnector mapped straight to NixlConnectorProtocol, which is the
same shape this branch moved NixlPushConnector to. NeuronNixlConnector is
deliberately left out of NIXL_CONNECTOR_NAMES: main resolves no side-channel
host for it, and that is not this branch's call to change.
- test_vllm_kv_connector_protocols.py: union the expected registry keys, and
relax the NIXL_CONNECTOR_NAMES check from equality to a subset plus explicit
membership. The equality form encoded an assumption main has now falsified --
sharing the params shape does not imply needing a side channel.
- runtime_config.rs, prefill_router/mod.rs, main.py: both sides added to the
same regions; kept both.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Signed-off-by: Guan Luo <41310872+GuanLuo@users.noreply.github.com>
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Overview
Source PRs that touch a documented Python/Rust symbol currently must carry the regenerated API reference page (the pre-merge freshness gate requires it), and because those pages live under
/docs/, the machine-generated diff alone pulls in docs codeowner review. Example: #13487 changes only frontend code + tests, yet waits on docs review for a regeneratedfrontend.mdxno human authored.This applies the #13344 pattern (releases.json/atom feed) to the API reference: the pages are deterministic outputs of
gen_python_api.py/gen_rust_api.py, so generate them at publish time against the exact ref being published instead of committing them. Source PRs never touch docs for a symbol change — no regenerated MDX in the diff, no freshness gate, no docs codeowner review. Supersedes #13551, which only exempted the committed pages from review.What changed
docs/fern/pages/reference/api/{python,rust}/and gitignored both directories (anchored at/pages/so the synced.gitignoreon the docs-website branch cannot swallow the publishedpages-dev/pages-vX.Y.Zsnapshots — the trap docs(ci): generate releases.json and atom feed at publish time #13344 hit with assets and had to force-add around).fern-docs.ymlpreview/publish: the existing--checkstep becomes real generation, before thepages-devrsync. Kubernetes keeps--check(its output regenerates from a committed docs-side file and stays committed).fern-docs.ymlversion tags: new generate-at-tag step so snapshots of future tags materialize the pages from the tagged source; older tags that still commit their pages (or predate the generators) are skipped, never failed.pre-merge.yml: the api-docs job runs both generators in write mode — a source PR that breaks generation (a signature griffe cannot parse, a removed module the curated list still names) still fails fast, without any committed artifact to diff. The fern-check job generates the pages beforefern checkso nav validation keeps passing. The Kubernetes freshness gate keeps its--sincescoping.simulate_docs_website.shgenerates the pages before replaying the sync, mirroring CI.test_shipped_rust_outputs_are_fresh(whose contract was the committed copy) became a render-determinism check; the workflow-contract regression test pins the new shape (write-mode python/rust everywhere,--checkonly for kubernetes).docs/fern/AGENTS.mdmoves the Python/Rust references into the existing publish-time category — they are a pure function of same-commit sources and griffe is already in the publish runner, exactly the doctrine's criterion.Verification
test_gen_python_api,test_gen_rust_api,test_gen_kubernetes_api,test_api_reference_regressions,test_api_freshness)git statusstays cleanbash -npasses on the simulate script🤖 Generated with Claude Code
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