Visible scaffold
Returns compressed working state as an ordinary system message that can be inspected, edited, logged, or rejected.
Langstate 0.2.2 · Python 3.10+ · Apache-2.0 published-release licenseOpen source · inspectable boundary
Inspectable context compression
Compress conversation history without hiding the working state.
Langstate compresses older conversation turns into a visible scaffold, preserves recent context, and emits deterministic receipts for literal facts you name.
$ langstate demoRelease
v0.2.2
Published on PyPI
Runtime
Python 3.10+
Apache-2.0 published-release license
First run
One pinned command
No project files required
Scope
Bounded tool
Not a system-level guarantee
§ 01
The problem
Why this exists
Make the evidence boundary visible.
Long-running agent sessions need smaller context, but an opaque summary can silently drop an operative constraint. Langstate makes the compressed scaffold inspectable and checks whether explicitly named facts survived before the result is reused.
§ 02
What it does
Recent-turn preservation
Keeps system messages and the requested recent suffix verbatim while compressing older turns.
Literal fact receipt
Checks named strings after compression and reports which survived without claiming semantic equivalence.
§ 04
Related research
RESEARCHThe Generative HorizonThe paper examines how retained language reshapes later interpretation and action; it is conceptual context, not a validation study of Langstate.RESEARCHPrecise Records, Unstable MeaningsThe study shows why precise records do not automatically establish stable meanings or outcomes; it does not measure Langstate compression quality.
§ 05
Related concepts
GLOSSARYContext integrityWhether operative constraints and relevant state remain available and correctly scoped across transformations.GLOSSARYReduction driftLoss or distortion introduced when complex context is compressed into a smaller representation.GLOSSARYContext engineeringDesigning the information made available to a model or agent at a particular decision point.
The boundary
Useful evidence is not a blanket guarantee.
Langstate is a lossy context-compression prototype, not a lossless archive, structured state store, or semantic-fidelity guarantee. Its receipt checks literal text only.
Compare it with the other open-source tools →Read about continuity and memory →