---
model: gpt-5.6-sol
service: opencode
session: tractor-addr-unpacking
timestamp: 2026-08-27T23:25:00Z
git_ref: d067505a
scope: code
substantive: true
raw_file: 20260827T232500Z_d067505a_prompt_io.raw.md
---

## Prompt

After committing the reviewed bindspace-reference changes, the human
asked to continue with the next Layer C increment.

## Response summary

Added the private Linux network-namespace entry primitive required by
future child bootstrap wiring. It verifies the inherited capability
before `setns()`, constrains entry to network namespaces, and verifies
the resulting process namespace before runtime initialization proceeds.

## Files changed

- `tractor/spawn/_netns.py` - synchronous verified netns entry.
- `tests/test_netns_spawn.py` - stale-FD, syscall and post-entry guards.
- `ai/tpt-backends/03_wg_tunnel_bindspace.md` - primitive ownership and
  remaining integration boundary.

## Human edits

The human requested the next incremental implementation after accepting
the prior split commits. Their established preference for end-to-end
tests informed use of real FDs where possible; only privileged `setns()`
and procfs observation are replaced to keep the suite unprivileged. In
staged review, the human requested the full project license header,
explicit comments on both intentional inode mismatches, and independent
call traces proving both fake syscall and procfs hooks execute. The
agent applied those human-directed revisions; no direct manual source
edits were observed.