Runtime warns CLAUDE.md is over the 150.0k-char limit (v2.1.259) but the docs do not mention a 150k limit

Summary

At session startup, when the user CLAUDE.md is large, Claude Code v2.1.259 prints:

/Users/.../CLAUDE.md is over the 150.0k-char limit (179.0k chars) · /memory to free up context

But the documentation never mentions a 150k-character limit. memory.md says "target under 200 lines" and notes that a file over 4 MiB is skipped entirely. Older material (#56406, Aug 2026) cites a 40,000-character warning threshold, which appears to have been raised to 150,000 since. Users cannot reconcile the shipped warning with the docs -- and the "150k" figure also collides with the auto-compact token window (#85205), which is a different thing.

Evidence

Startup banner, Claude Code v2.1.259:

/Users/.../CLAUDE.md is over the 150.0k-char limit (179.0k chars) · /memory to free up context

Request -- please document, for the current version:

1. The actual CLAUDE.md size-warning threshold (150.0k characters in v2.1.259), and whether it scales with the context window (see #56406).
2. Whether crossing it truncates or merely warns. The banner suggests /memory to free up context (a context-cost warning), while separate guidance says the file loads in full below the 4 MiB hard skip -- please confirm the two coexist and that content is not silently dropped.
3. Distinguish this character limit from the auto-compact token window (#85205), which shares the "150k" number and confuses users.

Prior art: #56406, #85205.

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_Filed via Claude Code on the user's behalf._