refactor(keyword): unify keyword injection into UserPromptSubmit pipeline

Move keyword detection from experimental.chat.messages.transform to claude-code-hooks
chat.message handler. Uses proven injectHookMessage file system approach for reliable
context injection.

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/features/context-injector/injector.ts

@@ -1,7 +1,6 @@
 import type { ContextCollector } from "./collector"
 import type { Message, Part } from "@opencode-ai/sdk"
 import { log } from "../../shared"
-import { detectKeywordsWithType, extractPromptText } from "../../hooks/keyword-detector"
 
 interface OutputPart {
   type: string
@@ -80,7 +79,6 @@ export function createContextInjectorMessagesTransformHook(
     "experimental.chat.messages.transform": async (_input, output) => {
       const { messages } = output
       if (messages.length === 0) {
-        log("[context-injector] messages.transform: no messages")
         return
       }
 
@@ -93,48 +91,24 @@ export function createContextInjectorMessagesTransformHook(
       }
 
       if (lastUserMessageIndex === -1) {
-        log("[context-injector] messages.transform: no user message found")
         return
       }
 
       const lastUserMessage = messages[lastUserMessageIndex]
       const sessionID = (lastUserMessage.info as unknown as { sessionID?: string }).sessionID
       if (!sessionID) {
-        log("[context-injector] messages.transform: no sessionID on last user message")
         return
       }
 
-      const userParts = lastUserMessage.parts as Array<{ type: string; text?: string }>
-      const promptText = extractPromptText(userParts)
-      const detectedKeywords = detectKeywordsWithType(promptText)
-      const hasPendingFromCollector = collector.hasPending(sessionID)
-
-      log("[context-injector] messages.transform check", {
-        sessionID,
-        detectedKeywords: detectedKeywords.map((k) => k.type),
-        hasPendingFromCollector,
-        messageCount: messages.length,
-      })
-
-      const contextParts: string[] = []
-
-      for (const keyword of detectedKeywords) {
-        contextParts.push(keyword.message)
+      if (!collector.hasPending(sessionID)) {
+        return
       }
 
-      if (hasPendingFromCollector) {
       const pending = collector.consume(sessionID)
-        if (pending.hasContent) {
-          contextParts.push(pending.merged)
-        }
-      }
-
-      if (contextParts.length === 0) {
+      if (!pending.hasContent) {
         return
       }
 
-      const mergedContext = contextParts.join("\n\n")
-
       const refInfo = lastUserMessage.info as unknown as {
         sessionID?: string
         agent?: string
@@ -162,7 +136,7 @@ export function createContextInjectorMessagesTransformHook(
             sessionID: sessionID,
             messageID: syntheticMessageId,
             type: "text",
-            text: mergedContext,
+            text: pending.merged,
             synthetic: true,
             time: { start: now, end: now },
           } as Part,
@@ -171,11 +145,10 @@ export function createContextInjectorMessagesTransformHook(
 
       messages.splice(lastUserMessageIndex, 0, syntheticMessage)
 
-      log("[context-injector] Injected synthetic message", {
+      log("[context-injector] Injected synthetic message from collector", {
         sessionID,
         insertIndex: lastUserMessageIndex,
-        contextLength: mergedContext.length,
-        keywordTypes: detectedKeywords.map((k) => k.type),
+        contextLength: pending.merged.length,
         newMessageCount: messages.length,
       })
     },

src/hooks/claude-code-hooks/index.ts

@@ -28,6 +28,7 @@ import { recordToolUse, recordToolResult, getTranscriptPath, recordUserMessage }
 import type { PluginConfig } from "./types"
 import { log, isHookDisabled } from "../../shared"
 import { injectHookMessage } from "../../features/hook-message-injector"
+import { detectKeywordsWithType, removeCodeBlocks } from "../keyword-detector"
 
 const sessionFirstMessageProcessed = new Set<string>()
 const sessionErrorState = new Map<string, { hasError: boolean; errorMessage?: string }>()
@@ -137,9 +138,21 @@ export function createClaudeCodeHooksHook(ctx: PluginInput, config: PluginConfig
           return
         }
 
-        if (result.messages.length > 0) {
-          const hookContent = result.messages.join("\n\n")
-          log(`[claude-code-hooks] Injecting ${result.messages.length} hook messages`, { sessionID: input.sessionID, contentLength: hookContent.length, isFirstMessage })
+        const detectedKeywords = detectKeywordsWithType(removeCodeBlocks(prompt))
+        const keywordMessages = detectedKeywords.map((k) => k.message)
+
+        if (keywordMessages.length > 0) {
+          log("[claude-code-hooks] Detected keywords", {
+            sessionID: input.sessionID,
+            types: detectedKeywords.map((k) => k.type),
+          })
+        }
+
+        const allMessages = [...keywordMessages, ...result.messages]
+
+        if (allMessages.length > 0) {
+          const hookContent = allMessages.join("\n\n")
+          log(`[claude-code-hooks] Injecting ${allMessages.length} messages (${keywordMessages.length} keyword + ${result.messages.length} hook)`, { sessionID: input.sessionID, contentLength: hookContent.length, isFirstMessage })
 
           if (isFirstMessage) {
             const idx = output.parts.findIndex((p) => p.type === "text" && p.text)

src/hooks/keyword-detector/index.ts

@@ -1,7 +1,6 @@
 import type { PluginInput } from "@opencode-ai/plugin"
-import { detectKeywordsWithType, extractPromptText } from "./detector"
+import { detectKeywordsWithType, extractPromptText, removeCodeBlocks } from "./detector"
 import { log } from "../../shared"
-import { contextCollector } from "../../features/context-injector"
 
 export * from "./detector"
 export * from "./constants"
@@ -24,10 +23,9 @@ export function createKeywordDetectorHook(ctx: PluginInput) {
       }
     ): Promise<void> => {
       const promptText = extractPromptText(output.parts)
-      const detectedKeywords = detectKeywordsWithType(promptText)
-      const messages = detectedKeywords.map((k) => k.message)
+      const detectedKeywords = detectKeywordsWithType(removeCodeBlocks(promptText))
 
-      if (messages.length === 0) {
+      if (detectedKeywords.length === 0) {
         return
       }
 
@@ -50,20 +48,9 @@ export function createKeywordDetectorHook(ctx: PluginInput) {
           )
       }
 
-      const context = messages.join("\n")
-
-      for (const keyword of detectedKeywords) {
-        contextCollector.register(input.sessionID, {
-          id: `keyword-${keyword.type}`,
-          source: "keyword-detector",
-          content: keyword.message,
-          priority: keyword.type === "ultrawork" ? "critical" : "high",
-        })
-      }
-
-      log(`[keyword-detector] Registered ${messages.length} keyword contexts`, {
+      log(`[keyword-detector] Detected ${detectedKeywords.length} keywords`, {
         sessionID: input.sessionID,
-        contextLength: context.length,
+        types: detectedKeywords.map((k) => k.type),
       })
     },
   }