* fix(suggest-compact): recognize large-window model families without a [1m] marker
resolveContextWindowTokens() only detected a 1M window via the env
override, the [1m] model-id marker, or observed tokens already above
200k. Large-window models whose ids carry none of these (e.g.
claude-fable-5) were misclassified as 200k windows, overstating
context usage ~5x in the compact suggestion.
Add a known-model-family substring table (claude-fable-5,
claude-mythos-5) checked after the env override and [1m] marker and
before the token-count heuristic. Env overrides still win, and unknown
model ids still fall back to the 200k default.
Closes#2461
* fix(suggest-compact): anchor known-model-family match at a token boundary
Unanchored substring matching would misclassify a hypothetical smaller
tier sharing a known family prefix (e.g. claude-fable-5-mini) as a 1M
window. Require the family id to end at a token boundary: end of id, a
delimiter, or a dated/versioned suffix (-20260115). Alphanumeric
continuations and letter suffixes no longer match.
Addresses CodeRabbit/Greptile review on #2468
