Declare
The host defines each module's floor, target, maximum, weight, lifecycle, protection, and whether it may lend or borrow.
PUBLIC ALPHA · PROVIDER-NEUTRAL · CANONICAL RUST KERNEL
Give every prompt token a job.
ContextLease manages an agent's context window like a resource allocator: protect critical modules, lend idle capacity, reclaim it safely, and compress only through registered release plans.
- 1 behavioral kernel
- 7 language targets
- ABI v2 native telemetry
allocation.live
systempinned
1,024
leases 768 tokens↓
memoryelastic · borrower
2,816
historyelastic · donor
2,304
lease.granted memory +768
Prompt builders usually discover context pressure at the last possible moment.
ContextLease makes it a controlled lifecycle:
Budget→Borrow→Reclaim→Observe
MEMORY-MANAGEMENT IDEAS, APPLIED TO PROMPTS
A hard context limit.
A predictable control loop.
Allocate
Demand is satisfied through protected floors, local targets, and donor-attributed expansion leases.
Reclaim
If donors grow, borrowers run the release pipelines they registered before receiving extra capacity.
Verify
Required terms, monotonic size, final bounds, and privacy-safe trace events are checked every time.
SEMANTIC COMPRESSION, WITHOUT LOCK-IN
Bring the model provider you already use.
Start with deterministic reducers. Add LLM summaries only where semantics matter. Provider IDs live in configuration and credentials stay in environment variables.
- Built-in OpenAI-compatible HTTP adapter
- Optional, lazy LiteLLM adapter
- Custom provider protocol and test callable
- Single-provider or multi-provider portfolio summaries
"providers": {
"summary-fast": {
"type": "openai-compatible",
"base_url": "https://…/v1",
"model": "summary-model",
"api_key_env": "MODEL_API_KEY"
}
}
"reclaim_pipeline": [{
"algorithm_id":
"builtin.semantic.summary.v1",
"options": {"provider": "summary-fast"}
}]OBSERVABILITY IS PART OF THE ALLOCATOR
See where the context went.
The bundled read-only Debug Web streams utilization, module pressure, compression, and donor-to-borrower leases. Prompt bodies stay out of telemetry.
BUILT FOR CONTEXT THAT CHANGES
Agent runtimes.
RAG pipelines.
Long conversations.
Tool-heavy workflows.
The core has no opinion about your modules. System contracts, tools, memory, retrieval, examples, and history are external choices—ContextLease gives them a shared, enforceable budget.
START WITH A REAL, RUNNABLE DEMO
Stop truncating blindly.
Make prompt pressure visible, reclaimable, and testable.