[KaisennHu]

Summary

This change archives the release standard of vllm-project/router (vLLM Router) in the repository knowledge base as a new repository slice, knowledge/repos/vllm-router/.

The page structure follows repos/vllm-omni/ci/release-gates.md. The gate content is derived from this repository's own release pipeline and CI configuration; vLLM-Omni's CUDA L4/L5 tiers and NPU lanes are not reused.

Contents

1. _index.md — repository entry. Records the upstream repository, the PyPI package vllm-router, the module vllm_router, aliases, and the current knowledge boundary.
2. ci/_index.md — CI entry. Describes the four Buildkite lanes (L1 ready, L2 merge, L3 nightly, release), the pytest markers, and the GPU hardware presets.
3. ci/release-gates.md — release standard, organised in four parts:
   1. Hard gates executed by .buildkite/release-pipeline.yml: version equality between the git tag and pyproject.toml; x86_64 and aarch64 wheel builds plus the sdist; binary and wheel smoke tests; the PyPI publication dependency chain; and the Docker release confirmation steps.
   2. Policy gates: the L2 merge result together with the latest L3 nightly run, which already covers GSM8K accuracy, the ROCm MI300 xGMI and RDMA lanes, and gRPC prefix-KV performance; unit-test coverage measured against the target set at iteration kickoff; scenario-level performance evidence without a uniform percentage threshold; requirement completion rate; remaining DI, which depends on aligning issue grading between router and agent-infer; and critical-issue ownership.
   3. Evidence rules: performance is compared per scenario for prefix-KV, L1 encode, and CPU overhead; coverage is reported against the kickoff target because CI enforces no threshold; DI is reported only after issues are graded, because the bug template carries a bug label but no severity field.
   4. Documented failure modes: version drift across the four version files; the README CI/CD section that contradicts the implemented pipeline; treating nightly builds as releases; Linux-only manylinux artifacts.

Metadata updates

1. knowledge/repos/_index.md — adds the vLLM-Router row.
2. doc/knowledge/SCHEMA.md — registers the vllm-router ownership tag, which the taxonomy requires before first use.

Validation

1. python knowledge/tools/check_knowledge_tree.py — no errors and no warnings for the new slice. Three pre-existing errors remain for repos/vllm-omni/**/rules.md on a local Windows autocrlf checkout; the corresponding LF blobs measure 32678, 32700, and 32692 bytes, below the 32768-byte threshold, so these are line-ending artifacts of the local checkout and are unrelated to this change.
2. python knowledge/tools/check_wiki_lint.py — no errors and no warnings across 1529 pages.

Boundary

This change covers CI and release knowledge only. components/, models/, _routes.yaml, and an adapter are not yet established, so Direct routing does not reach this repository. The release page must not be treated as a code owner during review.