Bump verifiers from 0.3.0 to 0.3.1 in /Evals/marginbench in the marginbench-python group

[dependabot]

Bumps the marginbench-python group in /Evals/marginbench with 1 update: verifiers.

Updates verifiers from 0.3.0 to 0.3.1

Release notes

Sourced from verifiers's releases.

v0.3.1

Highlights

• Model interception. Primitives to inspect, rewrite, or stop canonical vf.Request and vf.Response boundaries with @vf.intercept and @vf.stop for live monitoring of agent rollouts. (#2164, #2165, #2166, #2229, #2178).
• Persistent ACP sessions. Claude Code, Codex, Hermes, Kimi Code, OpenClaw, Pi, Pool, and RLM now use one live ACP session per rollout. Native conversation state remains intact across turns (#2291).
• Configurable task hooks. Config can plug in stop conditions, metrics, and rewards from Python modules or files. Config entries can override decorated hooks and their priority, weight, or metadata (#2309, #2323).
• Training-native episode and run artifacts. Episodes now carry task, group, run, policy, reference-logprob, and loss-weight data. Stable task keys, named run directories, exact config capture, and native Platform uploads make resume and training handoffs durable (#2278, #2357, #2358, #2409, #2429).
• Runtime and serving improvements. Eval uses elastic env serving by default and propagates cancellation to workers. Prime sandboxes default to VM isolation and support unbounded lifetimes. (#2356, #2362, #2396, #2401, #2412, #2413, #2422, #2428).

Breaking

Legacy and environment packages

• The v0 implementation moves under verifiers.legacy. Existing v0 imports remain aliased. The v1 bridge is removed, including vf.LegacyEnvConfig, EvalConfig.legacy, --legacy.id, init --v0, legacy serve routes, and row-indexed v1 resume. Use the vf-* entrypoints for v0 environments (#2303).
• Example environment IDs drop the -v1 suffix. For example, use gsm8k instead of gsm8k-v1. These packages now require Python 3.11 or later (#2303).

Runtimes and serving

• Prime VM is the default runtime. Eval and GEPA no longer default to subprocess. Validate and debug no longer default to Docker. Set the runtime explicitly to keep local execution, such as --env.agent.runtime.type subprocess for eval or --runtime.type docker for validate and debug (#2356).
• Prime sandboxes no longer have a 24-hour hard lifetime. VM sandboxes and containers without an idle timeout can run indefinitely. Use idle_timeout or explicit deletion for cleanup (#2412, #2413).
• Eval uses the env-server pool by default. The server boolean and --server flag are removed. Use --no-serve for in-process execution. run_eval now takes only the config, and run_eval_server is removed (#2422).
• rich is now an optional config block. Replace --rich false with --no-rich. Run logs now live under logs/attempt_<n>/eval.log; use the logs/latest symlink (#2422).

Run configs and records

• Run output uses output_dir / run.dir. The top-level uuid fields are removed. Use run.name, run.dir, and the process-created run.id. Resume is now a boolean flag on the saved config, not --resume <dir> (#2358).
• Saved configs use separate launch and resolved paths. Launch TOML lives at configs/<cli>.toml. Resolved JSON lives at configs/resolved/<cli>.json. Resume and replay can still read the earlier configs/<cli>.json layout (#2429).
• Episode records are the durable artifact. Episode.task is required. Run data moves from Trace.run to Episode.run. Bare-trace JSONL input, Trace.record_run, and Episode.of are removed (#2409).

Plugins and APIs

• V1 no longer installs Hub plugins automatically. Install each taskset, harness, judge, or env package before use. Plugin IDs must name installed packages; org/name[@version] IDs no longer resolve (#2390).
• ACP harnesses require live sessions. The ACP export and one-shot runner are removed. Use ACPConfig, ACPHarness, and rollout-scoped sessions (#2291).
• Custom dialects must implement interception methods. Dialect.parse_request now returns vf.Request. Dialects must implement request rewriting, response rewriting, and stream event generation. Rollout.open() can return False when a pre-open stop fires (#2164, #2165, #2166, #2229).
• Retry replay requires x-stainless-retry-count. Clients without this header resample repeated requests instead of replaying a recorded response (#2368).

Changelog

• Upload native v1 Episodes to Platform by @​mrmoxon in PrimeIntellect-ai/verifiers#2278
• fix: clamp per-call input token accounting so it never goes negative by @​mikasenghaas in PrimeIntellect-ai/verifiers#2297
• feat: make ServeConfig.address optional with no default by @​mikasenghaas in PrimeIntellect-ai/verifiers#2301
• Fix plain HTTP CONNECT for Docker framework routes by @​xeophon in PrimeIntellect-ai/verifiers#2298
• fix(v1): restore the unbounded model-call timeout by @​mikasenghaas in PrimeIntellect-ai/verifiers#2304
• chore(deps): bump gitpython from 3.1.57 to 3.1.58 by @​dependabot[bot] in PrimeIntellect-ai/verifiers#2305
• Use native model catalogs in agent harnesses by @​xeophon in PrimeIntellect-ai/verifiers#2308
• feat: config-plugged functions (stops, metrics, rewards) by @​mikasenghaas in PrimeIntellect-ai/verifiers#2309
• feat!: move v0 under verifiers.legacy (aliased), remove the v1 bridge, drop -v1 suffixes by @​mikasenghaas in PrimeIntellect-ai/verifiers#2303
• fix: harden the verifiers.legacy alias finder by @​mikasenghaas in PrimeIntellect-ai/verifiers#2311
• fix: revert native model catalogs in agent harnesses by @​mikasenghaas in PrimeIntellect-ai/verifiers#2314
• feat(compact): one tool call per turn, notes-only carryover by @​mikasenghaas in PrimeIntellect-ai/verifiers#2313

... (truncated)

Commits

• b2e4e81 fix(v1): pin nano-rlm to 83ef01f (#2379)
• 6c009ed Simplify V1 dialect implementations (#2426)
• 237a78f feat: split run configs into launch TOML and resolved dir (#2429)
• 4e7ab6a chore: bump renderers to 0.1.10 (#2433)
• 807aaf3 Simplify v1 CLI plumbing (#2427)
• 7b00ea3 Centralize V1 egress policy decisions (#2428)
• 85c92f3 fix(v1): forward sampling parameters across dialects (#2425)
• d4f3d5a feat(v1): stamp renderer mm token type map onto traces (#2424)
• a60a606 fix(v1): strip hub org prefix before importing a plugin module (#2423)
• 3892fbb feat: run evals through the env server by default (#2422)
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