Pin phone-opus to Opus max effort

5 files changed, 17 insertions, 3 deletions

diff --git a/README.md b/README.md
index 301f64a..19b0743 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,8 @@ telemetry surfaces:
 Each `consult` call runs Claude Code with:
 
 - the system `claude` binary
-- the normal settings stack, including user-level defaults
+- `--model claude-opus-4-6`
+- `--effort max`
 - no configured MCP servers (`--strict-mcp-config --mcp-config '{"mcpServers":{}}'`)
 - a read-only built-in toolset:
   - `Bash,Read,Grep,Glob,LS,WebFetch,WebSearch`
diff --git a/assets/codex-skills/phone-opus/SKILL.md b/assets/codex-skills/phone-opus/SKILL.md
index 5fe91d7..9ea2674 100644
--- a/assets/codex-skills/phone-opus/SKILL.md
+++ b/assets/codex-skills/phone-opus/SKILL.md
@@ -28,6 +28,7 @@ should be taken as authoritative or final. It is a pure consultant.
 
 ## Runtime posture
 
+- Pins Claude to Opus 4.6 with max effort.
 - Uses `--permission-mode dontAsk`, so only globally preapproved read-only Bash commands can execute.
 - This surface is consultative only. Edit tools are unavailable.
 - The returned `session_id` is reusable: pass it back into a later `consult` call to continue that Claude conversation.
diff --git a/crates/phone-opus/src/mcp/protocol.rs b/crates/phone-opus/src/mcp/protocol.rs
index 6662fa9..5cd8313 100644
--- a/crates/phone-opus/src/mcp/protocol.rs
+++ b/crates/phone-opus/src/mcp/protocol.rs
@@ -12,6 +12,8 @@ pub(crate) const HOST_STATE_ENV: &str = "PHONE_OPUS_MCP_HOST_STATE";
 pub(crate) const FORCE_ROLLOUT_ENV: &str = "PHONE_OPUS_MCP_TEST_FORCE_ROLLOUT_KEY";
 pub(crate) const WORKER_CRASH_ONCE_ENV: &str = "PHONE_OPUS_MCP_TEST_WORKER_CRASH_ONCE_KEY";
 pub(crate) const CLAUDE_BIN_ENV: &str = "PHONE_OPUS_CLAUDE_BIN";
+pub(crate) const CLAUDE_EFFORT: &str = "max";
+pub(crate) const CLAUDE_MODEL: &str = "claude-opus-4-6";
 pub(crate) const CLAUDE_TOOLSET: &str = "Bash,Read,Grep,Glob,LS,WebFetch,WebSearch";
 pub(crate) const EMPTY_MCP_CONFIG: &str = "{\"mcpServers\":{}}";
 
diff --git a/crates/phone-opus/src/mcp/service.rs b/crates/phone-opus/src/mcp/service.rs
index c57d0db..378ce43 100644
--- a/crates/phone-opus/src/mcp/service.rs
+++ b/crates/phone-opus/src/mcp/service.rs
@@ -13,7 +13,9 @@ use crate::mcp::fault::{FaultRecord, FaultStage};
 use crate::mcp::output::{
     ToolOutput, fallback_detailed_tool_output, split_presentation, tool_success,
 };
-use crate::mcp::protocol::{CLAUDE_BIN_ENV, CLAUDE_TOOLSET, EMPTY_MCP_CONFIG};
+use crate::mcp::protocol::{
+    CLAUDE_BIN_ENV, CLAUDE_EFFORT, CLAUDE_MODEL, CLAUDE_TOOLSET, EMPTY_MCP_CONFIG,
+};
 
 pub(crate) fn run_worker(generation: u64) -> Result<(), Box<dyn std::error::Error>> {
     let generation = generation_from_wire(generation);
@@ -346,6 +348,10 @@ fn invoke_claude(request: &ConsultRequest) -> Result<ConsultResponse, ConsultInv
         .arg(EMPTY_MCP_CONFIG)
         .arg("--disable-slash-commands")
         .arg("--no-chrome")
+        .arg("--model")
+        .arg(CLAUDE_MODEL)
+        .arg("--effort")
+        .arg(CLAUDE_EFFORT)
         .arg("--tools")
         .arg(CLAUDE_TOOLSET)
         .arg("--permission-mode")
diff --git a/crates/phone-opus/tests/mcp_hardening.rs b/crates/phone-opus/tests/mcp_hardening.rs
index bc338ca..918c3c4 100644
--- a/crates/phone-opus/tests/mcp_hardening.rs
+++ b/crates/phone-opus/tests/mcp_hardening.rs
@@ -257,7 +257,7 @@ fn consult_can_resume_a_prior_session_with_read_only_toolset_and_requested_worki
                     "output_tokens": 5
                 },
                 "modelUsage": {
-                    "claude-sonnet-4-6": {
+                    "claude-opus-4-6": {
                         "inputTokens": 10,
                         "outputTokens": 5
                     }
@@ -327,6 +327,10 @@ fn consult_can_resume_a_prior_session_with_read_only_toolset_and_requested_worki
     assert!(lines.contains(&"{\"mcpServers\":{}}"));
     assert!(lines.contains(&"--disable-slash-commands"));
     assert!(lines.contains(&"--no-chrome"));
+    assert!(lines.contains(&"--model"));
+    assert!(lines.contains(&"claude-opus-4-6"));
+    assert!(lines.contains(&"--effort"));
+    assert!(lines.contains(&"max"));
     assert!(lines.contains(&"--tools"));
     assert!(lines.contains(&"Bash,Read,Grep,Glob,LS,WebFetch,WebSearch"));
     assert!(lines.contains(&"--permission-mode"));