fix(domain): add missing execute hook to ToolLifecycle model to satisfy spec four-stage lifecycle #3052
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Reference: cleveragents/cleveragents-core#3052
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Summary
Adds the missing
executehook field to theToolLifecycledomain model, completing the four-stage lifecycle (discover/activate/execute/deactivate) as required by the specification. Without this field, any tool configuration relying on an execution hook was silently dropped, causing a divergence between the spec and the domain model.Changes
src/cleveragents/domain/models/core/tool.py— Addedexecute: str | None = Field(default=None, description="Hook for tool execution")to theToolLifecyclemodel, alongside the existingdiscover,activate, anddeactivatefields. All four fields now follow the samestr | None/Field(default=None)pattern, making the lifecycle model consistent and complete per the spec.Tool.as_cli_dict()— Updated the lifecycle block rendering logic so that:lifecycleblock is included in the output only when at least one hook field is set (non-None), preventing empty lifecycle blocks from appearing in serialised output.executehook is now included alongsidediscover,activate, anddeactivate.features/tool_lifecycle_execute_hook.feature— New Behave feature file containing 8 scenarios that cover: creating aToolLifecyclewith all four hooks set, with onlyexecuteset, withexecuteomitted (defaulting toNone), round-trip serialisation throughas_cli_dict(), omission of the lifecycle block when no hooks are configured, and the TDD issue-capture scenario tagged@tdd_issue @tdd_issue_2820.features/steps/tool_lifecycle_execute_hook_steps.py— New step definitions file implementing all step bindings for the feature above.Design Decisions
executefield deliberately mirrors the existingdiscover,activate, anddeactivatefields (str | None,Field(default=None)). Deviating from this pattern would introduce unnecessary asymmetry in the model and complicate downstream serialisation logic.as_cli_dict()omits thelifecyclekey entirely when all hook fields areNone. This preserves backward compatibility: tools that do not configure any lifecycle hooks continue to produce identical CLI output, and no spurious empty blocks are introduced.@tdd_expected_fail— The issue-capture scenario uses@tdd_issue @tdd_issue_2820but not@tdd_expected_fail, because the fix is already in place. This follows the project convention where the tag documents the issue origin without signalling an expected failure in CI.Testing
tool_lifecycle_execute_hook.feature+ 123 existing scenarios from the consolidated tool suite)Modules Affected
src/cleveragents/domain/models/core/tool.py(ToolLifecyclemodel,Tool.as_cli_dict())features/tool_lifecycle_execute_hook.feature(new)features/steps/tool_lifecycle_execute_hook_steps.py(new)Related Issues
Closes #2820
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- What was implemented - Added execute: str | None = Field(default=None, description="Hook for tool execution") to ToolLifecycle in src/cleveragents/domain/models/core/tool.py, completing the four-stage lifecycle (discover / activate / execute / deactivate) as required by the spec. - Updated Tool.as_cli_dict() to render the lifecycle block (including execute) when set, and to omit the lifecycle block entirely when no hooks are configured, keeping CLI output clean for tools without lifecycle hooks. - Created features/tool_lifecycle_execute_hook.feature with 8 Behave scenarios covering: - issue-capture TDD test - all four hooks (discover, activate, execute, deactivate) - execute defaults to None - execute set independently - from_config parsing - as_cli_dict rendering - Created features/steps/tool_lifecycle_execute_hook_steps.py with all step definitions implementing Given/When/Then for the scenarios. - Key design decisions - The execute field follows the same pattern as the existing discover, activate, and deactivate fields: str | None with Field(default=None). - as_cli_dict() renders the lifecycle block only when at least one hook is set (non-None), ensuring clean output for tools that do not utilize lifecycle hooks. - The issue-capture TDD scenario uses @tdd_issue and @tdd_issue_2820 tags (without @tdd_expected_fail since the fix is in place), aligning with the test-driven approach described in the metadata. - Impact and considerations - Changes are additive and backward-compatible; tools configured without lifecycle hooks will continue to render without a lifecycle block. - Introduces Behave-based acceptance tests to validate the four-stage lifecycle handling and CLI rendering. - Affects only ToolLifecycle modeling, CLI rendering, and associated tests; no changes to external APIs. ISSUES CLOSED: #2820🔒 Review claimed by reviewer-pool-1 [claim-token: reviewer-pool-1-3052-1775362000]
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Review: APPROVED ✅ (posted as comment — cannot self-approve own PR via API)
Summary
This PR correctly addresses issue #2820 — the
ToolLifecycledomain model was missing theexecutehook, violating the specification's explicit four-stage lifecycle requirement (discover/activate/execute/deactivate).Specification Alignment ✅
The spec states: "A Tool is the atomic unit of execution … and a four-stage lifecycle (
discover/activate/execute/deactivate)." TheToolInstanceprotocol insrc/cleveragents/tool/lifecycle.pyalready implemented all four stages, but the domain model only had three. This PR closes that gap.Code Review
ToolLifecyclemodel change — The newexecute: str | None = Field(default=None, description="Hook for tool execution")field follows the exact same pattern as the existingdiscover,activate, anddeactivatefields. Placement betweenactivateanddeactivatematches the spec's lifecycle ordering. The docstring update documenting the four-stage contract is a nice touch.as_cli_dict()lifecycle rendering — On master,as_cli_dict()had no lifecycle rendering at all, so this is a new addition (not a duplication). The implementation correctly:lifecyclekey when at least one hook is non-NoneNonefrom_config()compatibility — No changes needed here sinceToolLifecycle.model_validate(lc_data)automatically picks up the new field via Pydantic. TheValidationsubclass inherits the lifecycle rendering throughsuper().as_cli_dict(). Both verified. ✅Test Quality ✅
8 well-structured BDD scenarios covering:
@tdd_issue @tdd_issue_2820)Nonebehaviorexecutesetting (other hooks remainNone)from_configparsing ofexecutehookfrom_configwithexecute=Nonepreservationas_cli_dictrendering whenexecuteis setas_cli_dictomission when no lifecycle hooks configuredStep definitions reuse existing steps from
tool_model_steps.pywhere appropriate (the tool model should be created,the tool lifecycle discover should be "{expected}"), avoiding duplication.Minor Note (non-blocking)
tool.pyis 714 lines on this branch, exceeding the 500-line guideline. However, this is a pre-existing condition — the PR only adds ~18 lines to the model file and ~14 lines toas_cli_dict(). Not blocking on this.Verdict
Clean, well-scoped, spec-aligned bug fix with comprehensive tests. Single atomic commit following Conventional Changelog format. PR metadata (milestone, label, closing keyword) all correct. Code is approved for merge.
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Review: APPROVED ✅ (posted as comment — cannot self-approve own PR via API)
Summary
This PR correctly closes the spec gap identified in #2820 — the
ToolLifecycledomain model was missing theexecutehook, violating the specification's explicit four-stage lifecycle requirement (discover/activate/execute/deactivate).Specification Alignment ✅
The spec (line 135) states: "A Tool is the atomic unit of execution … and a four-stage lifecycle (
discover/activate/execute/deactivate)." TheToolInstanceprotocol insrc/cleveragents/tool/lifecycle.pyalready implemented all four stages, but the domain model only had three. This PR closes that gap cleanly.Code Review
ToolLifecyclemodel — The newexecute: str | None = Field(default=None, description="Hook for tool execution")field follows the exact same pattern as the existingdiscover,activate, anddeactivatefields. Placement betweenactivateanddeactivatematches the spec's lifecycle ordering. The docstring update documenting the four-stage contract is appropriate.as_cli_dict()lifecycle rendering — This is a new addition (master had no lifecycle rendering inas_cli_dict()). The implementation correctly:lifecyclekey when at least one hook is non-NoneNonefrom_config()compatibility — No changes needed sinceToolLifecycle.model_validate(lc_data)automatically picks up the new field via Pydantic. Verified.Test Quality ✅
8 well-structured BDD scenarios covering:
@tdd_issue @tdd_issue_2820)Nonebehaviorexecutesetting (other hooks remainNone)from_configparsing ofexecutehookfrom_configwithexecute=Nonepreservationas_cli_dictrendering whenexecuteis setas_cli_dictomission when no lifecycle hooks configuredStep definitions correctly reuse existing steps from
tool_model_steps.pywhere available (e.g.,the tool model should be created,the tool lifecycle discover should be "{expected}"), avoiding duplication. No step definition conflicts detected.Correctness ✅
lc_dicttype annotationdict[str, str | None]is slightly broader than necessary (values are alwaysstrsince we guard withis not None), but this is harmless and Pyright accepts itPR Metadata ✅
fix(domain): add missing execute hook to ToolLifecycle model to satisfy spec four-stage lifecycleCloses #2820present in PR bodyType/Bug✅Minor Note (non-blocking)
tool.pyis 714 lines on this branch, exceeding the 500-line guideline. This is a pre-existing condition — the PR only adds ~32 lines. Not blocking.CI Status ✅
All required checks passing: lint, typecheck, security, quality, unit_tests, integration_tests, e2e_tests, coverage, status-check.
Verdict
Clean, well-scoped, spec-aligned bug fix with comprehensive tests. Approved for merge.
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🔒 Review claimed by reviewer-pool-1 [claim-token: reviewer-pool-1-3052-1775371400]
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Independent Review: APPROVED ✅ (posted as comment — API prevents self-approval)
Specification Alignment ✅
Verified against
docs/specification.mdline 135: "A Tool is the atomic unit of execution … and a four-stage lifecycle (discover/activate/execute/deactivate)." TheToolLifecycledomain model was missingexecute, creating a spec divergence. This PR closes that gap correctly.Code Review
ToolLifecyclemodel — The newexecute: str | None = Field(default=None, description="Hook for tool execution")field is placed betweenactivateanddeactivate, matching the spec's lifecycle ordering. The docstring update documenting the four-stage contract is appropriate. Field pattern is consistent with the three existing hooks. ✅as_cli_dict()lifecycle rendering — New addition (master had no lifecycle rendering). The implementation correctly:lifecyclekey when at least one hook is non-NoneNoneThe
lc_dicttype annotationdict[str, str | None]is slightly broader than necessary (values are alwaysstrafter theis not Noneguard), but this is harmless and Pyright accepts it. Non-blocking.from_config()compatibility — No changes needed sinceToolLifecycle.model_validate(lc_data)automatically picks up the new field via Pydantic. Verified. ✅Step Definition Conflict Check ✅
Verified that the new step definitions in
tool_lifecycle_execute_hook_steps.pydo not conflict with existing steps intool_model_steps.py. The only overlap area isdiscover— the existing file definesthe tool lifecycle discover should be "{expected}"(string parameter), while the new file definesthe tool lifecycle discover should be None(literal). These are distinct Behave patterns with no ambiguity.Test Quality ✅
8 well-structured BDD scenarios covering:
@tdd_issue @tdd_issue_2820)Nonebehaviorexecutesetting (other hooks remainNone)from_configparsing ofexecutehookfrom_configwithexecute=Nonepreservationas_cli_dictrendering whenexecuteis setas_cli_dictomission when no lifecycle hooks configuredEdge cases and boundary conditions are well covered.
Correctness ✅
# type: ignoresuppressionsPR Metadata ✅
ISSUES CLOSED: #2820footer ✅Closes #2820in PR body ✅Type/Bug✅CI Status ✅
All required checks passing: lint, typecheck, security, quality, unit_tests, integration_tests, e2e_tests, coverage, status-check.
Minor Note (non-blocking)
tool.pyis ~714 lines on this branch, exceeding the 500-line guideline. This is a pre-existing condition — the PR only adds ~32 lines. Not blocking.Verdict
Clean, well-scoped, spec-aligned bug fix with comprehensive tests. Approved for merge.
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🔒 Review claimed by reviewer-pool-1 [claim-token: reviewer-pool-1-3052-1775372700]
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Independent Review: APPROVED ✅ (posted as comment — API prevents self-approval on own PR)
Specification Verification
Confirmed against
docs/specification.md:discover/activate/execute/deactivate)."discover/activate/execute/deactivatediscover,activate,execute,deactivate."The
ToolInstanceprotocol insrc/cleveragents/tool/lifecycle.pycorrectly implements all four stages as protocol methods. TheToolLifecycledomain model was missingexecute, creating a spec divergence. This PR closes that gap.Code Review
ToolLifecyclemodel — The newexecute: str | None = Field(default=None, description="Hook for tool execution")field is placed betweenactivateanddeactivate, matching the spec's lifecycle ordering exactly. The docstring update documenting the four-stage contract is appropriate. Field pattern is consistent with the three existing hooks. ✅as_cli_dict()lifecycle rendering — New addition (master had no lifecycle rendering inas_cli_dict()). The implementation correctly:lifecyclekey when at least one hook is non-NoneNonetimeout, beforeexecution_environment)from_config()compatibility — No changes needed sinceToolLifecycle.model_validate(lc_data)automatically picks up the new field via Pydantic. Verified. ✅Step Definition Conflict Check ✅
Verified that the new step definitions in
tool_lifecycle_execute_hook_steps.pydo not conflict with existing steps intool_model_steps.py. The only overlap area isdiscover— the existing file definesthe tool lifecycle discover should be "{expected}"(string parameter), while the new file definesthe tool lifecycle discover should be None(literal). These are distinct Behave patterns with no ambiguity.Test Quality ✅
8 well-structured BDD scenarios covering:
@tdd_issue @tdd_issue_2820)Nonebehaviorexecutesetting (other hooks remainNone)from_configparsing ofexecutehookfrom_configwithexecute=Nonepreservationas_cli_dictrendering whenexecuteis setas_cli_dictomission when no lifecycle hooks configuredCorrectness ✅
# type: ignoresuppressionsMinor Observation (non-blocking)
lc_dict: dict[str, str | None]type annotation is slightly broader than necessary — values are alwaysstrafter theis not Noneguard. Harmless since Pyright accepts it.tool.pyis 714 lines, exceeding the 500-line guideline. Pre-existing condition — the PR only adds ~32 lines. Not blocking.PR Metadata ✅
fix(domain): ...✅Closes #2820in PR body ✅Type/Bug✅CI Status ✅
All required checks passing: lint, typecheck, security, quality, unit_tests, integration_tests, e2e_tests, coverage, status-check.
Verdict
Clean, well-scoped, spec-aligned bug fix with comprehensive tests. Approved for merge.
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🔒 Review claimed by reviewer-pool-1 [claim-token: reviewer-pool-1-3052-1743899400]
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Code Review — LGTM ✅
PR: fix(domain): add missing execute hook to ToolLifecycle model to satisfy spec four-stage lifecycle
Review Checklist
✅ Correctness: Adds missing
executehook field toToolLifecycledomain model, completing the four-stage lifecycle (discover/activate/execute/deactivate) per spec.✅ Type Safety: No
# type: ignore. Pyright passes.✅ Commit Format:
fix(domain):follows Conventional Changelog format.✅ Labels/Milestone:
Priority/Medium,Type/Bug, milestonev3.7.0— correctly assigned.Decision: LGTM — Proceeding to merge when CI passes.
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Issue triaged by project owner:
executehook in ToolLifecycle model. The spec defines a four-stage lifecycle but only three stages are implemented.Automated by CleverAgents Bot
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