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.opencode/skills/sequential-thinking/references/core-patterns.md

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+# Core Sequential Thinking Patterns
+
+Essential revision and branching patterns.
+
+## Revision Patterns
+
+### Assumption Challenge
+Early assumption proves invalid with new data.
+```
+Thought 1/5: Assume X is bottleneck
+Thought 4/5 [REVISION of Thought 1]: X adequate; Y is actual bottleneck
+```
+
+### Scope Expansion
+Problem larger than initially understood.
+```
+Thought 1/4: Fix bug
+Thought 4/5 [REVISION of scope]: Architectural redesign needed, not patch
+```
+
+### Approach Shift
+Initial strategy inadequate for requirements.
+```
+Thought 2/6: Optimize query
+Thought 5/6 [REVISION of Thought 2]: Optimization + cache layer required
+```
+
+### Understanding Deepening
+Later insight fundamentally changes interpretation.
+```
+Thought 1/5: Feature broken
+Thought 4/5 [REVISION of Thought 1]: Not bug—UX confusion issue
+```
+
+## Branching Patterns
+
+### Trade-off Evaluation
+Compare approaches with different trade-offs.
+```
+Thought 3/7: Choose between X and Y
+Thought 4/7 [BRANCH A]: X—simpler, less scalable
+Thought 4/7 [BRANCH B]: Y—complex, scales better
+Thought 5/7: Choose Y for long-term needs
+```
+
+### Risk Mitigation
+Prepare backup for high-risk primary approach.
+```
+Thought 2/6: Primary: API integration
+Thought 3/6 [BRANCH A]: API details
+Thought 3/6 [BRANCH B]: Fallback: webhook
+Thought 4/6: Implement A with B contingency
+```
+
+### Parallel Exploration
+Investigate independent concerns separately.
+```
+Thought 3/8: Two unknowns—DB schema & API design
+Thought 4/8 [BRANCH DB]: DB options
+Thought 4/8 [BRANCH API]: API patterns
+Thought 5/8: Integrate findings
+```
+
+### Hypothesis Testing
+Test multiple explanations systematically.
+```
+Thought 2/6: Could be A, B, or C
+Thought 3/6 [BRANCH A]: Test A—not cause
+Thought 3/6 [BRANCH B]: Test B—confirmed
+Thought 4/6: Root cause via Branch B
+```
+
+## Adjustment Guidelines
+
+**Expand when**: Complexity discovered, multiple aspects identified, verification needed, alternatives require exploration.
+
+**Contract when**: Key insight solves earlier, problem simpler, steps merge naturally.
+
+**Example**:
+```
+Thought 1/5: Initial
+Thought 3/7: Complexity (5→7)
+Thought 5/8: Another aspect (7→8)
+Thought 8/8 [FINAL]: Complete
+```
+
+## Anti-Patterns
+
+**Premature Completion**: Rushing without verification → Add verification thoughts.
+
+**Revision Cascade**: Repeated revisions without understanding why → Identify root cause.
+
+**Branching Explosion**: Too many branches → Limit to 2-3, converge before more.
+
+**Context Loss**: Ignoring earlier insights → Reference previous thoughts explicitly.