feat(hooks): enhance prometheus-md-only with better patterns

Add more comprehensive markdown-only file patterns for Prometheus planning agent. Extend test coverage for new patterns.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/prometheus-md-only/index.ts

@@ -1,7 +1,7 @@
 import type { PluginInput } from "@opencode-ai/plugin"
 import { existsSync, readdirSync } from "node:fs"
 import { join, resolve, relative, isAbsolute } from "node:path"
-import { HOOK_NAME, PROMETHEUS_AGENTS, ALLOWED_EXTENSIONS, ALLOWED_PATH_PREFIX, BLOCKED_TOOLS, PLANNING_CONSULT_WARNING } from "./constants"
+import { HOOK_NAME, PROMETHEUS_AGENTS, ALLOWED_EXTENSIONS, ALLOWED_PATH_PREFIX, BLOCKED_TOOLS, PLANNING_CONSULT_WARNING, PROMETHEUS_WORKFLOW_REMINDER } from "./constants"
 import { findNearestMessageWithFields, findFirstMessageWithAgent, MESSAGE_STORAGE } from "../../features/hook-message-injector"
 import { getSessionAgent } from "../../features/claude-code-session-state"
 import { log } from "../../shared/logger"
@@ -125,6 +125,17 @@ export function createPrometheusMdOnlyHook(ctx: PluginInput) {
         )
       }
 
+      const normalizedPath = filePath.toLowerCase().replace(/\\/g, "/")
+      if (normalizedPath.includes(".sisyphus/plans/") || normalizedPath.includes(".sisyphus\\plans\\")) {
+        log(`[${HOOK_NAME}] Injecting workflow reminder for plan write`, {
+          sessionID: input.sessionID,
+          tool: toolName,
+          filePath,
+          agent: agentName,
+        })
+        output.message = (output.message || "") + PROMETHEUS_WORKFLOW_REMINDER
+      }
+
       log(`[${HOOK_NAME}] Allowed: .sisyphus/*.md write permitted`, {
         sessionID: input.sessionID,
         tool: toolName,