Consolidate duplicate patterns and simplify codebase (#1317)

* refactor(shared): unify binary downloader and session path storage

- Create binary-downloader.ts for common download/extract logic
- Create session-injected-paths.ts for unified path tracking
- Refactor comment-checker, ast-grep, grep downloaders to use shared util
- Consolidate directory injector types into shared module

* feat(shared): implement unified model resolution pipeline

- Create ModelResolutionPipeline for centralized model selection
- Refactor model-resolver to use pipeline
- Update delegate-task and config-handler to use unified logic
- Ensure consistent model resolution across all agent types

* refactor(agents): simplify agent utils and metadata management

- Extract helper functions for config merging and env context
- Register prompt metadata for all agents
- Simplify agent variant detection logic

* cleanup: inline utilities and remove unused exports

- Remove case-insensitive.ts (inline with native JS)
- Simplify opencode-version helpers
- Remove unused getModelLimit, createCompactionContextInjector exports
- Inline transcript entry creation in claude-code-hooks
- Update tests accordingly

---------

Co-authored-by: justsisyphus <justsisyphus@users.noreply.github.com>

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

@@ -24,7 +24,7 @@ import {
   type PreCompactContext,
 } from "./pre-compact"
 import { cacheToolInput, getToolInput } from "./tool-input-cache"
-import { recordToolUse, recordToolResult, getTranscriptPath, recordUserMessage } from "./transcript"
+import { appendTranscriptEntry, getTranscriptPath } from "./transcript"
 import type { PluginConfig } from "./types"
 import { log, isHookDisabled } from "../../shared"
 import type { ContextCollector } from "../../features/context-injector"
@@ -92,7 +92,11 @@ export function createClaudeCodeHooksHook(
       const textParts = output.parts.filter((p) => p.type === "text" && p.text)
       const prompt = textParts.map((p) => p.text ?? "").join("\n")
 
-      recordUserMessage(input.sessionID, prompt)
+      appendTranscriptEntry(input.sessionID, {
+        type: "user",
+        timestamp: new Date().toISOString(),
+        content: prompt,
+      })
 
       const messageParts: MessagePart[] = textParts.map((p) => ({
         type: p.type as "text",
@@ -198,7 +202,12 @@ export function createClaudeCodeHooksHook(
       const claudeConfig = await loadClaudeHooksConfig()
       const extendedConfig = await loadPluginExtendedConfig()
 
-      recordToolUse(input.sessionID, input.tool, output.args as Record<string, unknown>)
+      appendTranscriptEntry(input.sessionID, {
+        type: "tool_use",
+        timestamp: new Date().toISOString(),
+        tool_name: input.tool,
+        tool_input: output.args as Record<string, unknown>,
+      })
 
       cacheToolInput(input.sessionID, input.tool, input.callID, output.args as Record<string, unknown>)
 
@@ -253,7 +262,13 @@ export function createClaudeCodeHooksHook(
       const metadata = output.metadata as Record<string, unknown> | undefined
       const hasMetadata = metadata && typeof metadata === "object" && Object.keys(metadata).length > 0
       const toolOutput = hasMetadata ? metadata : { output: output.output }
-      recordToolResult(input.sessionID, input.tool, cachedInput, toolOutput)
+      appendTranscriptEntry(input.sessionID, {
+        type: "tool_result",
+        timestamp: new Date().toISOString(),
+        tool_name: input.tool,
+        tool_input: cachedInput,
+        tool_output: toolOutput,
+      })
 
       if (!isHookDisabled(config, "PostToolUse")) {
         const postClient: PostToolUseClient = {

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

@@ -28,56 +28,6 @@ export function appendTranscriptEntry(
   appendFileSync(path, line)
 }
 
-export function recordToolUse(
-  sessionId: string,
-  toolName: string,
-  toolInput: Record<string, unknown>
-): void {
-  appendTranscriptEntry(sessionId, {
-    type: "tool_use",
-    timestamp: new Date().toISOString(),
-    tool_name: toolName,
-    tool_input: toolInput,
-  })
-}
-
-export function recordToolResult(
-  sessionId: string,
-  toolName: string,
-  toolInput: Record<string, unknown>,
-  toolOutput: Record<string, unknown>
-): void {
-  appendTranscriptEntry(sessionId, {
-    type: "tool_result",
-    timestamp: new Date().toISOString(),
-    tool_name: toolName,
-    tool_input: toolInput,
-    tool_output: toolOutput,
-  })
-}
-
-export function recordUserMessage(
-  sessionId: string,
-  content: string
-): void {
-  appendTranscriptEntry(sessionId, {
-    type: "user",
-    timestamp: new Date().toISOString(),
-    content,
-  })
-}
-
-export function recordAssistantMessage(
-  sessionId: string,
-  content: string
-): void {
-  appendTranscriptEntry(sessionId, {
-    type: "assistant",
-    timestamp: new Date().toISOString(),
-    content,
-  })
-}
-
 // ============================================================================
 // Claude Code Compatible Transcript Builder (PORT FROM DISABLED)
 // ============================================================================