context-receipts

Context Receipts

Use this skill when an agent workflow claims to save context by selecting, deferring, hydrating, summarizing, compacting, pruning, delegating, attributing usage, or isolating context.

The job is not to log the private content. The job is to emit a small receipt that lets a reviewer answer:

what crossed the context boundary, what stayed out, and what audit gap remains?

Privacy defaults

Never include raw prompts, raw tool schemas, raw tool arguments, raw tool results, raw skill bodies, memory bodies, secrets, customer names, or full transcripts in the receipt.

Prefer:

• stable ids or hashed ids;
• counts and token/line buckets;
• categorical reasons;
• explicit booleans for raw content copied/not copied;
• before/after context budget buckets;
• an audit_gap field when the receipt proves routing but not semantic correctness.

60-second Tool Search smoke

For MCP Tool Search, lazy tool loading, or progressive disclosure, emit enough evidence to answer these seven checks:

1. Index-only startup: did the session load a compact tool/server index instead of all full schemas?
2. Search/routing: what hashed query/category or routing reason selected candidate tools?
3. Hydration: which full tool definition was loaded, why, and how many definitions stayed suppressed?
4. Call: which server/tool id was invoked, with argument/result redaction status and success/error status?
5. Boundary: if a manager subagent or child agent was used, did raw child output return to the parent?
6. Budget: what were the startup and post-hydration context-token buckets?
7. Audit gap: what is not proven, such as whether the selected tool was semantically optimal?

Minimal JSONL event names:

{"event":"mcp.tool_index.loaded","loaded_server_count":12,"loaded_tool_index_count":84,"full_schema_count":0,"suppressed_tool_count":84,"raw_schema_copied":false,"startup_token_bucket":"lt_1k"}
{"event":"mcp.tool_search.performed","query_hash":"sha256:...","query_category":"repo_search","candidate_tool_count":5,"selected_tool_id":"github.search_code","raw_query_copied":false}
{"event":"mcp.tool_definition.loaded","tool_id":"github.search_code","hydrate_reason":"selected_after_tool_search","suppressed_tool_count":83,"definition_token_bucket":"1k_2k","raw_schema_copied":false}
{"event":"mcp.tool_call.completed","tool_id":"github.search_code","args_hash":"sha256:...","result_token_bucket":"2k_4k","raw_args_copied":false,"raw_result_copied":false,"status":"ok"}