---
model: openai/gpt-5.6-sol
service: opencode
session: ses_3e4c90d3eafeqHEtRYSIHgHhpA
timestamp: 2026-08-18T19:30:02Z
git_ref: bf06b4f8
scope: code
substantive: true
raw_file: 20260818T193002Z_bf06b4f8_prompt_io.raw.md
---

## Prompt

Distill repeated `Actor._contexts.pop()` machinery into a wrapper like
the RPC-task registration helper so future teardown sites do not keep
reconstructing the context-registry key independently. Preserve the
existing lifecycle-specific cleanup behavior.

## Response summary

Add idempotent `Actor._drop_context()` registry removal keyed from the
context's own channel and CID. Use it for caller context teardown and
the strict callee-side RPC deregistration path.

## Files changed

- `tractor/runtime/_runtime.py` - own context-registry removal.
- `tractor/runtime/_rpc.py` - use the helper for callee teardown.
- `tractor/_context.py` - use the helper after caller teardown.

## Human edits

The human identified the repeated registry-pop code and requested a
central primitive analogous to `_register_rpc_task()`. The agent first
suggested an async helper that also closed receive channels; the final
design was narrowed to registry removal only so each lifecycle owner
retains its existing closure, debugger, shielding, and error policy.
