* docs: turn README into an index and move reference detail to docs/guide
The README had grown to 393 KB because every change appended its notes there. The text moves verbatim into 18 topic guides under docs/guide/; only headings are re-leveled and relative links re-pointed. The README keeps the introduction, a quick start and a guide index. Contributor test notes move to CONTRIBUTING.md.
* docs: send user docs to topic guides and budget the root README
The rule 'update README.md for user-facing changes' is what grew the README. Guidance now points to docs/guide/, and check_agent_guidance.py fails when the root README exceeds 16 KiB (AG003).
* chore: remove unreferenced screenshots and finished plan notes
pr-build/ holds two PR screenshots (3 MB) from #1986. plans/ holds the plan for the merged #4049. docs/SKILL_NAME_CONFLICT_FIX.md is a February change note. Nothing references them.
* docs: route always-loaded AGENTS.md files to scoped guides
* docs(agents): cut scoped guides to scope, verify, traps, decisions
Each AGENTS.md keeps four kinds of content: the scope of the directory, the
verification commands, traps a local test run does not show, and decisions the
code cannot state. Values, field lists, function inventories, test names, issue
numbers and history are deleted, because the code, the tests and git state them.
Search and fetch providers share one community guide. Four guides with no
remaining content are removed. The size check now allows 6 KiB per file (hard
limit 8 KiB) and 24 KiB per chain (hard limit 32 KiB).
* style: format frontend guide table and guidance test imports
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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
* docs: govern agent guidance size
* refactor: split agent guidance by code scope
* Clarify virtual path handling in AGENTS.md
Updated the translation section to clarify the role of `LocalSandboxProvider` and the handling of virtual paths in the tool layer.
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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
