* docs(agents): add per-crate guides, architecture invariants, and generated-files list
Add agent/contributor navigation docs modeled on the AGENTS.md convention:
- Per-crate AGENTS.md for hot crates (mito2, metric-engine, flow, frontend,
meta-srv): module map, read/write paths, change-coupling points, test
commands, and gotchas.
- .agents/architecture-invariants.md: repo-wide rules that clippy and the
style guide do not cover (format compatibility, crate layering, async
runtimes, error handling, experimental gating, the DataFusion fork).
- .agents/generated-files.md: tool-generated artifacts that must not be
hand-edited (sqlness .result, config.md, dashboards, build.rs output, proto).
- Anchor the .gitignore CLAUDE.md/AGENTS.md rules to the repo root so per-crate
AGENTS.md files are tracked while root-level personal config stays ignored.
Signed-off-by: Dennis Zhuang <killme2008@gmail.com>
* chore: update crate AGENTS.md and fix config.md path
Signed-off-by: Dennis Zhuang <killme2008@gmail.com>
* docs(agents): fix DataFusion patch layout and SQL query lifecycle order
Address review feedback on #8346:
- architecture-invariants: the DataFusion sub-crates pin an exact crates.io
version in [workspace.dependencies] and are redirected to the fork rev in
[patch.crates-io]; the two sections hold different forms, not the same rev.
- frontend: the SQL query lifecycle runs the pre_parsing/post_parsing
interceptors around parsing, before the per-statement permission check.
Signed-off-by: Dennis Zhuang <killme2008@gmail.com>
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Signed-off-by: Dennis Zhuang <killme2008@gmail.com>
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