I read this as implementation of a disposable RED CLI E2E surface only - WORKING: I’ll inspect the real contracts, build the narrow loopback harness, then run the exact command and preserve the failing transcript plus cleanup receipt.


I read this as the exploration-to-implementation transition - the repo already contains DualCoach v1.1 service/adapter contracts, so I’m tracing their CLI entrypoint and Telegram transport seam before writing the isolated harness.


I read this as the implementation phase - I found the earliest faithful gap: the real adapter authenticates `getMe` but does not enforce configured expected bot identity, so the RED harness will prove a mismatched bot still connects through a real loopback Bot API contract.


I read this as verification of the RED surface - the harness and fake are now in place; I’m running the exact command once, then checking the marker, cleanup receipt, socket/process state, static diagnostics, and owned-file scope.


I read this as completion reporting - the disposable RED CLI E2E surface is implemented and verified.

- Exact command exits `1` with final marker `DISPOSABLE_E2E_FAIL`.
- Faithful gap: configured Telegram bot identity is ignored and the mismatched bot enters polling.
- Uses the real adapter against a loopback-only fake API.
- Cleanup receipt confirms server stopped, port released, and temporary profile removed.
- `ruff`, `ty`, and compilation pass.
- Files are single-purpose, boundary inputs are parsed, no type escape hatches or polling sleeps were added, and behavior is locked by the RED command.
- No production or existing test files were edited by this task. Concurrent sibling test files remain visible in status.


I read this as a focused evidence-boundary fix - I’ll first reproduce the permission failure, then switch all artifacts to private atomic writes, add an in-driver boundary self-check, and rerun Ruff, compile, and the exact RED command.


I read this as the RED-to-verification transition - the pre-change mode check reproduced `0664`; private atomic writes and the built-in mode/marker/loopback/cleanup verifier are now implemented, so I’m running static gates before the exact command.


I read this as a required size-safe extraction before execution - the driver crossed the 250-line defect threshold, so I’m extracting only the evidence-boundary responsibility into one support module, preserving behavior, then rerunning all focused gates.


I read this as completion of the evidence-boundary revision - private atomic evidence handling is implemented and verified.

- Exact command exits `1`; stdout ends with `DISPOSABLE_E2E_FAIL`.
- Evidence directory is `0700`; all JSON, JSONL, and transcript artifacts are `0600`.
- Both canonical and in-directory transcripts contain the final marker.
- `failure.json` also records the marker and faithful identity-enforcement gap.
- Exclusive temporary writes, `fsync`, and atomic replacement are used.
- Built-in self-check proves modes, marker, loopback-only binding, and cleanup.
- No process, port, temporary profile, or temporary evidence file remains.
- Ruff, Ty, and compilation pass.
- No production files were edited.

Architectural review: each support file has one responsibility; boundaries remain typed; no escape hatches, variant issues, polling sleeps, parameter bloat, or logging changes. The driver is at 205 pure LOC, so further growth should be extracted rather than added inline.