mask¶

Offload — lossy, reversible

Age-based garbage collection: keep the newest few tool outputs verbatim, replace older ones with a short marker + stash.

How it works¶

mask is age-based garbage collection: it keeps the newest keep_recent tool outputs verbatim and replaces older ones (≥ min_tokens) with a short <<cg:HASH>> marker + stash. It is complementary to the content-based offloaders.

Before → After¶

after (older):  [older tool output masked] <<cg:…>> [full output: call context_guru_expand]

Lossiness¶

Lossy but reversible — masked outputs are stashed and recovered via context_guru_expand / GET /expand.

Configuration¶

Key	Default	Meaning
`keep_recent`	3	Newest tool outputs kept verbatim.
`min_tokens`	100	Only mask older outputs at least this large.

When it shines¶

Long agent trajectories where old tool results are unlikely to matter. In the agent preset it is the biggest lever (~27% content-token savings, no reward loss — see RESULTS.md).

When it's inert¶

≤ keep_recent tool outputs, small outputs.