chore(v1): remove dead code and v0 leftovers

[hallerite]

Pure deletions. Every item has zero references in verifiers, prime-rl, prime-envs and community-environments (grep + GitHub code search); nothing here changes behaviour.

v0 config trees (−820 lines). configs/eval/, configs/gepa/, configs/rl/, configs/zero3.yaml, configs/endpoints.toml are the vf-eval / DeepSpeed formats of the removed v0 stack. tests/v1/test_configs.py already excluded them; the filter goes with them.

pyproject. The [[tool.uv.dependency-metadata]] nemo-gym block is inert (nemo-gym stopped being a dependency in #2476; the PEP 723 header in tasksets/nemo_gym/server.py is the one that is used), so uv.lock loses its manifest entry. Markers integration, slow, unit, parsers, rubrics, environments are applied by no test; the cellpylib warning filter targets a package that is not in the lock.

Dead code.

• Harness.run(): the pre-session launch/resume dispatch, superseded by HarnessSession.turn.
• Agents.__iter__/__len__: no reader anywhere; every env addresses agents by attribute.
• saved_config_path: the fallback to the pre-feat: split run configs into launch TOML and resolved dir #2429 configs/<cli>.json location. Only configs/resolved/ is written.
• eval/gepa usage gate: the --taskset./--harness. prefixes kept alive for flags removed in feat(v1)!: two-level concurrency, and serving as its own config block #2157/feat!: remove the serve CLI, rename ServingConfig to ServeConfig #2237.
• ServerBase.EXTRAS and the RUNTIME_PYTHON hook in mcp/launch.py: declared by no server anywhere.
• PrimeAgentHarness.SUPPORTS_RESUME: ACPHarness overrides session(), so both sites that read the flag short-circuit before reaching it.

snapshot_untracked was removed in the first revision and restored in the second: prime-envs #792 calls it from four SWE tasksets (capture_patch(ignore=...)). Open PRs in the env repos are now part of the check.

Deliberately not in this PR: anything on the Trace/Episode record model (Episode aggregates, PolicySpan.drift, Trace.last_message) — those have downstream consumers outside this repo; agent_config_fields (its _declared_agent_configs twin checks field defaults, not values, so swapping is not a pure deletion), WireTrace, InterceptionError, the Branch trainer-side properties, and every docs/docstring wording fix. Those are separate PRs.

Checks run on the branch: ruff check, ruff format --check, ty check verifiers, and pytest tests/v1 -m "not e2e" (82 passed).

🤖 Generated with Claude Code

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Note

Low Risk
Mostly deletions of unreferenced configs and code; the only behavioral tweaks are stricter CLI axis detection, resolved-config-only replay paths, and always running full MCP sandbox installs.

Overview
Removes v0-era configuration that is no longer part of the v1 stack: the entire configs/eval/, configs/gepa/, configs/rl/ trees, configs/endpoints.toml, and configs/zero3.yaml. Config validation in tests/v1/test_configs.py no longer special-cases endpoints.toml.

Tooling cleanup drops the unused nemo-gym [[tool.uv.dependency-metadata]] block from pyproject.toml (and the matching uv.lock manifest), unused pytest markers, and a cellpylib warning filter for a package not in the lock.

Dead v1 code paths are deleted without replacing callers: Harness.run() (segment dispatch now lives on HarnessSession.turn), Agents.__iter__/__len__, legacy resolved-config lookup in saved_config_path, narrowed eval/gepa CLI usage gates (no --taskset. / --harness. shortcuts), MCP sandbox install no longer honors ServerBase.EXTRAS or RUNTIME_PYTHON, and PrimeAgentHarness.SUPPORTS_RESUME (unused because ACP harnesses use session()).

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Note

Remove v0 config files, dead code, and fix CLI usage-gate bypass in v1

• Deletes leftover v0 configs under configs/ (endpoint registry, eval/gepa/rl TOMLs, zero3.yaml) and removes unused pytest markers, dependency metadata, and dead class members (Agents.__iter__, Agents.__len__, ServerBase.EXTRAS, PrimeAgentHarness.SUPPORTS_RESUME).
• Restricts the typed-axis usage-gate bypass in main.py and gepa.py to --env./--serve. prefixes only; --taskset. and --harness. arguments no longer suppress the usage message.
• Removes the configs/ fallback in output.py: saved_config_path now searches only configs/resolved/.
• Changes non-subprocess MCP server launch in launch.py to always install a sandbox venv and use its Python, dropping the RUNTIME_PYTHON override and server-class extras suffix.
• Risk: non-subprocess MCP servers no longer honor a prebuilt RUNTIME_PYTHON executable; saved_config_path returns None for runs with JSON only under configs/ rather than configs/resolved/.

^{Macroscope summarized 8389294.}

[macroscopeapp]

Approvability

Verdict: Approved at 45d21a1

Macroscope's review found this PR approvable — This is a narrowly scoped cleanup removing unused v0 configurations and superseded v1 code paths. Current runtime behavior is preserved, with only bounded removal of obsolete compatibility and extension hooks.

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