fix(rules): drop legacy sisyphus rule sources

packages/rules-core/src/constants.ts

@@ -4,14 +4,13 @@ export const PROJECT_MARKERS = [".git", "pyproject.toml", "package.json", "Cargo
 
 export const PROJECT_RULE_SUBDIRS = [
   [".omo", "rules"],
-  [".sisyphus", "rules"],
   [".claude", "rules"],
   [".cursor", "rules"],
   [".github", "instructions"],
 ] as const;
 
 export const PROJECT_RULE_FILES = [".github/copilot-instructions.md"] as const;
-export const OPENCODE_USER_RULE_DIRS = [".omo/rules", ".sisyphus/rules", ".opencode/rules"] as const;
+export const OPENCODE_USER_RULE_DIRS = [".omo/rules", ".opencode/rules"] as const;
 export const USER_RULE_DIR = ".claude/rules";
 export const RULE_EXTENSIONS = [".md", ".mdc"] as const;
 export const GITHUB_INSTRUCTIONS_PATTERN = /\.instructions\.md$/;
@@ -21,13 +20,11 @@ export const EXCLUDED_DIRS = new Set(["node_modules", ".git", "dist", "build", "
 
 export const SOURCE_PRIORITY: ReadonlyMap<RuleSource, number> = new Map([
   [".omo/rules", 0],
-  [".sisyphus/rules", 1],
-  [".claude/rules", 2],
-  [".cursor/rules", 3],
-  [".github/instructions", 4],
-  [".github/copilot-instructions.md", 5],
+  [".claude/rules", 1],
+  [".cursor/rules", 2],
+  [".github/instructions", 3],
+  [".github/copilot-instructions.md", 4],
   ["~/.omo/rules", 100],
-  ["~/.sisyphus/rules", 101],
-  ["~/.opencode/rules", 102],
-  ["~/.claude/rules", 103],
+  ["~/.opencode/rules", 101],
+  ["~/.claude/rules", 102],
 ]);

packages/rules-core/src/index.test.ts

@@ -55,11 +55,11 @@ describe("rules-core", () => {
     expect(found.map((rule) => rule.relativePath)).toEqual([
       ".github/copilot-instructions.md",
       ".omo/rules/omo.md",
-      ".sisyphus/rules/sisyphus.md",
       ".claude/rules/claude.md",
       ".cursor/rules/cursor.md",
       ".github/instructions/github.instructions.md",
     ]);
+    expect(found.map((rule) => rule.relativePath)).not.toContain(".sisyphus/rules/sisyphus.md");
   });
 
   it("#given frontmatter aliases and negative glob #when matching #then honors applyTo paths and exclusions", () => {
@@ -113,7 +113,7 @@ describe("rules-core", () => {
 
     // then
     expect(first).toEqual(second);
-    expect(cache.stats()).toEqual({ candidateEntries: 1, directoryEntries: 11 });
+    expect(cache.stats()).toEqual({ candidateEntries: 1, directoryEntries: 9 });
   });
 
   it("#given nested project markers #when finding project root #then memoizes ancestor lookups", () => {

packages/rules-core/src/types.ts

@@ -23,13 +23,11 @@ export interface RuleFileCandidate {
 
 export type RuleSource =
   | ".omo/rules"
-  | ".sisyphus/rules"
   | ".claude/rules"
   | ".cursor/rules"
   | ".github/instructions"
   | ".github/copilot-instructions.md"
   | "~/.omo/rules"
-  | "~/.sisyphus/rules"
   | "~/.opencode/rules"
   | "~/.claude/rules";