diff --git a/.story_kit/project.toml b/.story_kit/project.toml
index eb2b371..1a2c482 100644
--- a/.story_kit/project.toml
+++ b/.story_kit/project.toml
@@ -51,7 +51,7 @@ system_prompt = "You are a supervisor agent. Read CLAUDE.md and .story_kit/READM
 [[agent]]
 name = "coder-1"
 role = "Full-stack engineer. Implements features across all components."
-model = "claude-sonnet-4-6"
+model = "claude-sonnet-4-5-20241022"
 max_turns = 50
 max_budget_usd = 5.00
 prompt = "You are working in a git worktree on story {{story_id}}. Read CLAUDE.md first, then .story_kit/README.md to understand the dev process. The story details are in your prompt above. Follow the SDTW process through implementation and verification (Steps 1-3). The worktree and feature branch already exist - do not create them. Check .mcp.json for MCP tools. Do NOT accept the story or merge - commit your work and stop. If the user asks to review your changes, tell them to run: cd \"{{worktree_path}}\" && git difftool {{base_branch}}...HEAD\n\nIMPORTANT: Commit all your work before your process exits. The server will automatically run acceptance gates (cargo clippy + tests) when your process exits and advance the pipeline based on the results."
@@ -60,7 +60,7 @@ system_prompt = "You are a full-stack engineer working autonomously in a git wor
 [[agent]]
 name = "coder-2"
 role = "Full-stack engineer. Implements features across all components."
-model = "claude-sonnet-4-6"
+model = "claude-sonnet-4-5-20241022"
 max_turns = 50
 max_budget_usd = 5.00
 prompt = "You are working in a git worktree on story {{story_id}}. Read CLAUDE.md first, then .story_kit/README.md to understand the dev process. The story details are in your prompt above. Follow the SDTW process through implementation and verification (Steps 1-3). The worktree and feature branch already exist - do not create them. Check .mcp.json for MCP tools. Do NOT accept the story or merge - commit your work and stop. If the user asks to review your changes, tell them to run: cd \"{{worktree_path}}\" && git difftool {{base_branch}}...HEAD\n\nIMPORTANT: Commit all your work before your process exits. The server will automatically run acceptance gates (cargo clippy + tests) when your process exits and advance the pipeline based on the results."
@@ -69,7 +69,7 @@ system_prompt = "You are a full-stack engineer working autonomously in a git wor
 [[agent]]
 name = "coder-3"
 role = "Full-stack engineer. Implements features across all components."
-model = "claude-sonnet-4-6"
+model = "claude-sonnet-4-5-20241022"
 max_turns = 50
 max_budget_usd = 5.00
 prompt = "You are working in a git worktree on story {{story_id}}. Read CLAUDE.md first, then .story_kit/README.md to understand the dev process. The story details are in your prompt above. Follow the SDTW process through implementation and verification (Steps 1-3). The worktree and feature branch already exist - do not create them. Check .mcp.json for MCP tools. Do NOT accept the story or merge - commit your work and stop. If the user asks to review your changes, tell them to run: cd \"{{worktree_path}}\" && git difftool {{base_branch}}...HEAD\n\nIMPORTANT: Commit all your work before your process exits. The server will automatically run acceptance gates (cargo clippy + tests) when your process exits and advance the pipeline based on the results."
@@ -87,7 +87,7 @@ system_prompt = "You are a senior full-stack engineer working autonomously in a
 [[agent]]
 name = "qa"
 role = "Reviews coder work in worktrees: runs quality gates, generates testing plans, and reports findings."
-model = "claude-sonnet-4-6"
+model = "claude-sonnet-4-5-20241022"
 max_turns = 40
 max_budget_usd = 4.00
 prompt = """You are the QA agent for story {{story_id}}. Your job is to review the coder's work in the worktree and produce a structured QA report.
@@ -153,7 +153,7 @@ system_prompt = "You are a QA agent. Your job is read-only: review code quality,
 [[agent]]
 name = "mergemaster"
 role = "Merges completed coder work into master, runs quality gates, archives stories, and cleans up worktrees."
-model = "claude-sonnet-4-6"
+model = "claude-sonnet-4-5-20241022"
 max_turns = 30
 max_budget_usd = 3.00
 prompt = """You are the mergemaster agent for story {{story_id}}. Your job is to merge the completed coder work into master using the merge_agent_work MCP tool.