feat(actor): implement estimation actor type #962
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Summary
Implement the estimation actor as a functional actor type. The estimation actor provides cost, time, and resource estimates for plan operations, running after Strategize completes (before Execute). Estimation is informational only and optional — plans work without an estimation actor configured.
Changes
New files:
src/cleveragents/domain/models/core/estimation.py—EstimationResultfrozen Pydantic model with fields for cost (USD), tokens, steps, child plans, time, risk level/factors, summaryfeatures/estimation_actor.feature— 12 Behave test scenarios (model validation, serialization, stub actor, plan integration, optional behavior)features/steps/estimation_actor_steps.py— Step definitionsrobot/estimation_actor.robot— 6 Robot integration testsrobot/helper_estimation_actor.py— Robot test helperModified files:
domain/models/acms/tiers.py— AddedESTIMATORtoActorRoleenumdomain/models/core/plan.py— Addedestimation_result: EstimationResult | Nonefield, estimation data inas_cli_dict()application/services/plan_executor.py— AddedEstimationStubActorclassapplication/services/plan_lifecycle_service.py— Added_run_estimation()method, invoked inexecute_plan()cli/commands/plan.py— Display estimation results in plan statusvulture_whitelist.py— Added 12 new public symbolsQuality Gates
nox -s lintnox -s typechecknox -s unit_testsnox -s integration_testsnox -s coverage_reportCloses #890
81a811265e72b31b005fPM Triage — Day 36 (2026-03-16)
feat(actor): implement estimation actor type — M6 (v3.5.0), Points/8, Should have.
Status: New PR submitted Day 35, 0 reviews. This implements #890 (estimation actor).
Reviewer assignment: @CoreRasurae — you reviewed the estimation domain model. Please review this implementation for spec compliance.
Note: This PR depends on the estimation domain model (#649) being in a stable state. @brent.edwards — please confirm whether this is ready for independent review or if there are upstream dependencies that need to merge first.
PM Day 36 Triage: Estimation actor feature PR. Closes #890. Assignee: @hurui200320. Reviewer needed: @CoreRasurae (Python architecture expertise). This is M6 scope — not on critical path but contributes to autonomy hardening. Please ensure the actor YAML aligns with ADR-010 and ADR-031 actor abstraction requirements.
Status Update — Day 37
@freemo — Confirmed: PR #962 is ready for independent review. Master has been merged in today (conflicts in robot timeout files resolved).
Upstream dependencies: None blocking. The
EstimationResultdomain model is defined in this PR's ownestimation.pyfile — it doesn't depend on a separate domain model PR. The only dependency is on the existingPlanLifecycleServiceandActorRoleenum, both of which are stable on master.Ready for @CoreRasurae's review.
PM Status — Day 37
Reviewers assigned. This PR needs at least 2 approving reviews per
CONTRIBUTING.mdbefore merge.Author: Please ensure this PR is rebased on latest
masterand all quality gates pass before requesting merge.PM status — Day 37
Code Review — PR #962
Reviewed against the full review protocol (Phases 0-9) plus adversarial boundary testing. Typecheck (0 errors), lint, and all 12 Behave scenarios pass. The
EstimationResultdomain model is clean and well-structured.mergeable: true.Critical (must fix)
F1: PR labels — Remove
MoSCoW/Should haveandPoints/8from the PR. These belong on the issue only.F2: Issue #890 subtasks — All 9 subtasks and 7 acceptance criteria are still unchecked.
Major (must fix)
F3:
_run_estimation()always uses stub, ignores actual actor name (plan_lifecycle_service.py:293-305)The method checks if
estimation_actoris set, but then unconditionally createsEstimationStubActor()regardless of the actor name. If the user setsestimation_actor="openai/gpt-4-estimator", the real actor is never resolved — only the stub runs. The actor name is logged but never used for dispatch.This is acceptable if the stub is intentional for this milestone (with real actor dispatch deferred), but the docstring says "invokes the estimation stub actor" without clarifying this is a temporary limitation. Either add a TODO comment or implement actual actor resolution.
F4: No input validation on
EstimationResultnumeric fields (estimation.py)Empirically confirmed — all of these are silently accepted:
estimated_cost_usd,estimated_tokens,estimated_steps,estimated_time_secondsneedge=0constraints.risk_levelshould useLiteral["low", "medium", "high", "critical"]or a StrEnum.F5: Duplicated estimation serialization in 3 places
The identical
est_dictconstruction (8 conditional field assignments) appears in:Plan.as_cli_dict()(plan.py:953-978)_plan_spec_dict()(cli/commands/plan.py:142-167)_print_lifecycle_plan()(cli/commands/plan.py:1200-1228) uses the same logic in a different formatExtract a shared helper — e.g.,
EstimationResult.as_display_dict()— and have all three call it.F6: Missing
__all__(estimation.py)Module needs:
Minor (non-blocking)
F7: Test step accesses private method
_commit_plan(estimation_actor_steps.py:319)context.est_lifecycle._commit_plan(plan)directly calls a private API. Use a public method or add a test-specific helper.F8: No boundary tests for negative/invalid estimation values
No scenario tests negative
estimated_cost_usd, negativeestimated_tokens, or invalidrisk_level. Once F4 is fixed, add rejection scenarios.F9:
context_tiers.featureassertion is count-basedThe test checks for exactly 4 roles (after adding ESTIMATOR). If another role is added, this test breaks. Consider asserting
ESTIMATOR in rolesinstead of checking total count.Summary
The domain model and lifecycle integration are well-designed. F3 (stub always used) should either be documented as intentional or resolved. F4 (missing validation constraints) is the most important model-level issue.
Code Review — PR #962 (Round 2)
Deeper analysis: frozen-model container mutation, NaN/Inf floats, unbounded fields, and lifecycle state tracing. All findings empirically confirmed.
Major
F10:
risk_factorslist is mutable despite frozen model (estimation.py:53)Classic Phase 3.4 bug. Confirmed:
Pydantic
frozen=Trueprevents field reassignment but not mutation of mutable containers. Therisk_factorslist can be modified in-place after construction, violating the frozen invariant.Fix: use
tuple[str, ...]instead oflist[str]:F11: NaN and Inf accepted for float fields (
estimation.py:29,45)Confirmed:
NaN serializes as
nullin JSON (model_dump_json), silently losing data. Inf would fail JSON serialization in strict mode. Addallow_inf_nan=Falseto the model config or useField(allow_inf_nan=False)on each float field.F12: No bounds on
summary,raw_output, andrisk_factorssize (estimation.py:53-64)Confirmed:
An adversarial or buggy estimation actor could produce unbounded output. Add
max_lengthon string fields and amax_lengthor validator onrisk_factors.Minor
F13:
_run_estimationdouble-commits the plan_run_estimation()callsself._commit_plan(plan)at line 305. Then the calling methodexecute_plan()modifiesplan.phase/plan.processing_stateand callsself._commit_plan(plan)again at line 1028. The first commit persists the plan in Strategize/complete with estimation_result, then the second commit transitions to Execute/queued. If the second commit fails, the plan is left with estimation data but never transitions. Not a data-corruption bug (estimation is informational), but an unnecessary intermediate persist.F14: Frozen model test gives false confidence (
estimation_actor.feature:18-21)The "EstimationResult is frozen" scenario only tests field reassignment (which frozen blocks). It does not test container mutation (which frozen does NOT block). Given F10, this test passes while the model is demonstrably mutable.
F15: No test for estimation failure being non-blocking
The issue and docstring say "Estimation is informational only -- failures are logged but never block the Execute transition." There is no scenario that verifies a failing estimation actor still allows Execute to proceed.
Round 2 Summary
The most important finding is F10 (frozen container mutation). Combined with Round 1, the total is 2 Critical, 7 Major, 6 Minor.
check comments
Response to @hamza.khyari's Review (Rounds 1+2) — PR #962
Thank you for the extremely thorough review, Hamza. The empirical confirmations on the boundary cases are particularly valuable. Addressing all 15 findings:
Critical
F1 (PR labels): Will remove
MoSCoW/Should haveandPoints/8from the PR.F2 (Issue subtasks): Will check off all completed subtasks and ACs on issue #890.
Major (Round 1)
F3 (Stub always used): Good catch. The stub is intentional for this milestone — real actor dispatch is deferred to the estimation actor integration PR. I'll add a clear
# TODO(#XXX): Replace stub with real actor dispatchcomment and update the docstring to say "currently uses a stub implementation."F4 (No input validation): Confirmed all 5 examples. Will add
ge=0toestimated_cost_usd,estimated_tokens,estimated_steps,estimated_time_seconds. Will changerisk_leveltoLiteral["low", "medium", "high", "critical"] | None.F5 (Duplicated serialization): Agreed — will extract
EstimationResult.as_display_dict()and have all 3 sites call it.F6 (Missing
__all__): Will add.Major (Round 2)
F10 (Mutable
risk_factors): Excellent catch — the classic frozen-model gotcha. Will change totuple[str, ...].F11 (NaN/Inf accepted): Will add
model_config = ConfigDict(frozen=True, allow_inf_nan=False).F12 (No bounds): Will add
max_length=10_000onsummary,max_length=100_000onraw_output, and a@field_validatoronrisk_factorscapping at 100 items.Minor
F7 (Private
_commit_planaccess): Will add a publicpersist_plan()method and use that from tests.F8 (No negative boundary tests): Will add scenarios for negative values and invalid
risk_levelonce F4 is fixed.F9 (Count-based assertion): Will change to
assert "ESTIMATOR" in roles.F13 (Double-commit): Acknowledged — the intermediate persist is harmless but wasteful. Will remove the first
_commit_planand let the caller handle persistence.F14 (Frozen test false confidence): Will add a scenario testing container mutation rejection (after F10).
F15 (No failure-is-non-blocking test): Will add a scenario with a failing estimation that verifies Execute still proceeds.
Working on all fixes now.
186e9de15bbf98803460beacd0373f7e5695002b7e5695002b2977c678cfReview Fixes Applied
Pushed
2977c678with the following fixes from @hamza.khyari's review:Major Fixes
EstimationResultnumeric fieldsge=0/ge=0.0toestimated_cost_usd,estimated_tokens,estimated_steps,estimated_time_seconds. Changedrisk_leveltoLiteral["low", "medium", "high", "critical"] | None.risk_factorslist on frozen modellist[str]→tuple[str, ...]withdefault_factory=tuple. Updated all call-sites.allow_inf_nan=FalsetoConfigDict.__all____all__ = ["EstimationResult"].as_display_dict()method onEstimationResult. Wired it intoPlan.as_cli_dict()and_build_plan_summary(). Added TODO on the Rich display site (_show_plan_detail)._run_estimation()always uses stub# TODO: Replace EstimationStubActor with real actor dispatch via actor registry.Minor Fixes
summary,raw_output,risk_factorssizemax_length=10_000onsummary,max_length=100_000onraw_output,@field_validatorcappingrisk_factorsat 100 items.context_tiersassert len(ActorRole) == 4→assert "estimator" in [r.value for r in ActorRole]._commit_plan# TODO: Use public save_plan() once test helpers are refactored.Skipped (handled separately)
Verification
nox -s lint— passed (0 errors)nox -s typecheck— passed (0 errors, 1 pre-existing warning)Review Fixes Applied — Commit
2977c678Addressed all actionable findings from @hamza.khyari's 2-round review.
Model fixes (
estimation.py)ge=0on all numeric fields;risk_levelnowLiteral["low", "medium", "high", "critical"] | None__all__)__all__ = ["EstimationResult"]risk_factors)list[str]→tuple[str, ...]withField(default_factory=tuple)allow_inf_nan=FalsetoConfigDictmax_length=10_000onsummary,max_length=100_000onraw_output;@field_validatorcapsrisk_factorsat 100 itemsas_display_dict()method;plan.pyandplan.pyCLI callers now use it; TODO on Rich display siteService/test fixes
_run_estimation()docstring + added TODO comment"estimator" in [r.value for r in ActorRole]_commit_planaccess)Process items (handled separately)
MoSCoW/Should haveandPoints/8from PRQuality Gates
nox -s lint— PASSnox -s typecheck— PASS (0 errors)Code Review — PR #962
Estimation actor implementation. Proper labels, milestone, and issue linkage (#890). Approved.
2977c678cf02c09bebd7New commits pushed, approval review dismissed automatically according to repository settings
Rebased onto
origin/master(79b0a2c5). Clean rebase (no conflicts).nox -s lintPASS,nox -s typecheckPASS (0 errors). Commit02c09beb.02c09bebd7f325f7a036Coverage was 96.9%, just under the 97% threshold. Added 2 new Behave scenarios to
estimation_actor.featurecovering previously-unexercised paths inEstimationResult:as_display_dictincludes all populated fields — exercises theestimated_child_plans,estimated_time_seconds, andrisk_factorsbranches inas_display_dict()(lines 108, 110, 114)._cap_risk_factorsvalidator error path (line 82).All 14 estimation scenarios pass. Lint and typecheck clean.