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… IDs Add a new ExecPlan document defining the lifecycle-safe contextual storage and cleanup of correlation IDs using Python contextvars, aligned with roadmap item 2.4.2 and design-doc section 3.3.4. The plan includes stages for test coverage, implementation, documentation updates, and quality gates to ensure correctness and isolation of correlation ID handling in middleware request processing. Co-authored-by: devboxerhub[bot] <devboxerhub[bot]@users.noreply.github.com>
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Reviewer's GuideAdds a new ExecPlan markdown document describing the end-to-end implementation and validation plan for introducing a contextvar-based correlation ID lifecycle in middleware, without changing any code yet. Sequence diagram for contextvar-based correlation ID lifecycle in middlewaresequenceDiagram
actor Client
participant Framework
participant Middleware
participant Request
participant Response
participant CorrelationContextVar
participant CorrelationContextStore
Client->>Framework: incoming HTTP request
Framework->>Middleware: process_request(request)
Middleware->>CorrelationContextVar: set(correlation_id)
CorrelationContextVar-->>Middleware: token
Middleware->>CorrelationContextStore: store_token(request_id, token)
Middleware-->>Framework: request processed
Framework->>Framework: route and execute view/handler
alt handler succeeds
Framework->>Middleware: process_response(request, response)
Middleware->>CorrelationContextStore: get_token(request_id)
CorrelationContextStore-->>Middleware: token
Middleware->>CorrelationContextVar: reset(token)
Middleware->>CorrelationContextStore: clear_token(request_id)
Middleware-->>Framework: response processed
Framework-->>Client: HTTP response
else handler fails with exception
Framework->>Middleware: process_response(request, error_response)
Middleware->>CorrelationContextStore: get_token(request_id)
CorrelationContextStore-->>Middleware: token
Middleware->>CorrelationContextVar: reset(token)
Middleware->>CorrelationContextStore: clear_token(request_id)
Middleware-->>Framework: error response processed
Framework-->>Client: HTTP error response
end
Class diagram for planned contextvar correlation ID middleware componentsclassDiagram
class CorrelationContextVar {
<<ContextVar>>
+str name
+str default
+set(str value) token
+get() str
+reset(token token) void
}
class CorrelationContextStore {
+store_token(str request_id, token token) void
+get_token(str request_id) token
+clear_token(str request_id) void
}
class CorrelationIdMiddleware {
+CorrelationContextVar correlation_var
+CorrelationContextStore context_store
+process_request(Request request) void
+process_response(Request request, Response response) Response
-str generate_correlation_id(Request request)
}
class Request {
+str id
+dict state
}
class Response {
+int status_code
+dict headers
}
CorrelationIdMiddleware --> CorrelationContextVar : uses
CorrelationIdMiddleware --> CorrelationContextStore : uses
CorrelationContextStore --> Request : keys_by id
CorrelationIdMiddleware --> Request : reads_writes state
CorrelationIdMiddleware --> Response : attaches_headers
Flow diagram for ExecPlan stages A–E for contextvar lifecycle workflowchart TD
A[Stage A: Align references
- Locate roadmap 2.4.2
- Locate design section 3.3.4
- Locate middleware and context storage modules
- Update ExecPlan paths] --> B[Stage B: Add failing tests
- Unit tests for set/token/reset/failure cleanup
- Behavioural tests for visibility/clearing/isolation]
B --> C[Stage C: Implement middleware lifecycle
- process_request sets ContextVar and stores token
- process_response resets using stored token
- Wire cleanup into failure paths]
C --> D[Stage D: Update documentation
- Design doc lifecycle rationale
- Users guide behaviour and API details
- Mark roadmap item 2.4.2 complete]
D --> E[Stage E: Run validation gates
- make check-fmt
- make typecheck
- make lint
- make test
- Optional: make markdownlint
- Record evidence in ExecPlan]
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Summary
What changed
Plan of work (highlights)
Validation plan
Acceptance criteria (post-implementation)
Risks and considerations
Notes for reviewers
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Summary by Sourcery
Documentation: