Add RSA extraction bootstrap and working notes

sprints/SPRINT-003-whetstone-dsl-gate-semantic-bootstrap.md

@@ -246,6 +246,8 @@ Status:
 - extraction rules for `prereq_op_selector` and execution-contract child
   decisions captured in
   `docs/case_studies/whetstone_dsl_gate_extraction_specs_v0.md`
+- machine-readable extraction contracts captured in
+  `semantic/rsa_gate_extraction_contracts_v0.json`
 
 ### Deliverable D: Artifact-grounded extraction path
 
@@ -258,10 +260,13 @@ Status:
 - audit captured in `docs/case_studies/whetstone_dsl_run_artifact_audit.md`
 - first extraction rules captured in
   `docs/case_studies/whetstone_dsl_gate_extraction_specs_v0.md`
+- parser-facing extraction contracts captured in
+  `semantic/rsa_gate_extraction_contracts_v0.json`
 
 ## Active Next Task
 
-Turn the first extraction specs into machine-readable extraction contracts for:
+Use `semantic/rsa_gate_extraction_contracts_v0.json` to draft the first
+artifact parser for:
 
 - `prereq_op_selector`
 - `target_file_selection`
@@ -270,6 +275,48 @@ Turn the first extraction specs into machine-readable extraction contracts for:
 
 Status:
 
+- complete
+- parser implemented in `tools/extract_gate_rows.py`
+- sample output generated in `semantic/extracted_gate_rows_sample.ndjson`
+
+## Next Active Task
+
+Run the parser over a broader taskitem-run slice and review extraction yield by:
+
+- gate id
+- provenance class
+- rejection-flag frequency
+
+Status:
+
+- complete for first 50-run slice
+- output captured in `semantic/extracted_gate_rows_slice.ndjson`
+- yield review captured in
+  `docs/case_studies/whetstone_dsl_extraction_yield_snapshot.md`
+
+## Updated Working Conclusion
+
+The first extraction-ready dataset candidate is:
+
+- `prereq_op_selector`
+
+The following remain explicit but review-gated due to strong sibling-uniform
+template behavior in the current slice:
+
+- `target_file_selection`
+- `acceptance_command_selection`
+- `required_tool_selection`
+
+## Next Active Task
+
+Turn `prereq_op_selector` into the first accepted dataset slice, with:
+
+- accepted rows
+- rejected rows
+- explicit schema-drift examples
+
+Status:
+
 - partially complete
 - `prereq_op_selector` is now represented as structured/factorized in
   `semantic/rsa_semantic_bootstrap_v0.json`