I read this as implementation - WORKING: I’ll inspect the isolated worktree and Python/testing conventions, then build the typed loopback fake test-first, verify focused quality gates, and confirm the accepted E2E remains a faithful identity RED with cleanup.


I read this as implementation - exploration is complete: the existing fake only covers `getMe`/poll entry, while the runner and private atomic evidence already preserve the accepted identity RED; I’m starting the failing focused contract tests now, without touching production code.


I read this as implementation - the RED contract is now GREEN; I’m entering strict review and verification, including type/lint cleanup, size checks, then the exact disposable E2E command to prove the identity gap still exits 1 and releases all resources.


I read this as implementation - the fake Telegram foundation is GREEN while the accepted identity E2E remains faithfully RED.

Implemented:

- Typed loopback API covering all requested Telegram methods.
- Exact update offsets and monotonic update/message IDs.
- Telegram-compatible not-modified response.
- Sanitized append-only action records and named futures.
- Private atomic evidence with `0700` directories and `0600` files.
- Deterministic cleanup without sleeps or polling loops.
- Focused seven-test contract suite.

Verified:

- `pytest`: 7 passed.
- Ruff, ty, basedpyright, `py_compile`, and no-excuse checks passed.
- Exact E2E command exited `1` with `DISPOSABLE_E2E_FAIL`.
- Identity gap remained faithful.
- Server thread stopped, loopback port released, temporary profile removed.
- Evidence leak scan found no token or message content.
- Only exclusive-scope files were edited by this task; concurrent parent production diffs were untouched.

Architectural review passed: transport, mutable state machine, and typed payload ownership are separated; input is parsed at the HTTP boundary; variants are exhaustive; no type escape hatches, polling, production crash hooks, or redundant cleanup checks were introduced. The runner is in the 200-250 LOC warning band and should be split before its next substantive expansion.