update reserach skill

.cursor/skills/research/references/quality-checklists.md

@@ -34,6 +34,8 @@
 - [ ] Competitor analysis included: Existing solutions were researched
 - [ ] All components have comparison tables: Each component lists alternatives with tools, advantages, limitations, security, cost
 - [ ] Tools/libraries verified: Suggested tools actually exist and work as described
+- [ ] Component fit matrix completed: `06_component_fit_matrix.md` exists and every selected component/tool/pattern is marked `Selected`
+- [ ] No field-adjacent substitution: no selected candidate is chosen only because it solves a similar class of problem while failing the project's explicit constraints
 - [ ] Testing strategy covers AC: Tests map to acceptance criteria
 - [ ] Tech stack documented (if Phase 3 ran): `tech_stack.md` has evaluation tables, risk assessment, and learning requirements
 - [ ] Security analysis documented (if Phase 4 ran): `security_analysis.md` has threat model and per-component controls
@@ -45,6 +47,8 @@
 - [ ] New draft is self-contained: Written as if from scratch, no "updated" markers
 - [ ] Performance column included: Mode B comparison tables include performance characteristics
 - [ ] Previous draft issues addressed: Every finding in the table is resolved in the new draft
+- [ ] Existing component fit audited: every old and new component/tool/pattern was checked against `restrictions.md`, `acceptance_criteria.md`, and the Project Constraint Matrix
+- [ ] Rejected/experimental candidates are not lead recommendations unless the user explicitly accepted the risk
 
 ## Timeliness Check (High-Sensitivity Domain BLOCKING)
 
@@ -76,3 +80,14 @@ When the research topic has Critical or High sensitivity level:
 - [ ] Cited facts have corresponding statements in the original text (no over-interpretation)
 - [ ] Source publication/update dates annotated; technical docs include version numbers
 - [ ] Unverifiable information annotated `[limited source]` and not sole support for core conclusions
+
+## Exact-Fit Validation (BLOCKING)
+
+- [ ] Project Constraint Matrix extracted from problem context before component selection
+- [ ] Every selected component/tool/library/service/pattern/algorithm has evidence for required inputs/outputs and integration boundaries
+- [ ] Every selected candidate has evidence for the operating context and lifecycle assumptions it must support
+- [ ] Every selected candidate has evidence for non-functional targets that are binding for the project
+- [ ] Known unsupported scenarios and failure reports were searched for every selected candidate
+- [ ] Mismatches are recorded as disqualifiers, not softened into generic limitations
+- [ ] Any candidate with unproven fit is marked `Experimental only` or escalated for user decision
+- [ ] Any candidate with documented constraint conflict is marked `Rejected`