fix: migrate Claude model files to current API IDs (opus-5, sonnet-5, haiku-4.5)

Bug 57d8a047-d26d-47ce-ae6f-bc5cb98fef0e: Opus-tier tasks 404'd because
models/claude-opus-4.yaml pinned default_flags.model to "claude-opus-4-5",
a retired ID. models/claude-sonnet-4.yaml was pinned to a dated snapshot
("claude-sonnet-4-20250514") with the same problem.

Slug strategy: the registry slug (filename / RegistryEntry.name) doubles
as the literal --model argument on the workflow-template pass-through path
(task-templates/workflow/*.yaml `model:` field -> compiler WF-COMP-18 ->
payload.runtime.model -> entrypoint/runners/claude.py `--model`), which has
no translation step through this file's default_flags. So rather than
patch default_flags.model in place (leaving the slug stale and the
pass-through bug latent), rename the slug to match the current API ID:

- models/claude-opus-4.yaml, model-registry/claude-opus-4.yaml
  -> claude-opus-5.yaml (name/endpoint/default_flags.model: claude-opus-5)
- models/claude-sonnet-4.yaml, model-registry/claude-sonnet-4.yaml
  -> claude-sonnet-5.yaml (claude-sonnet-5)
- model-registry/claude-haiku-4.yaml -> claude-haiku-4-5.yaml
  (claude-haiku-4-5); added the previously-missing models/claude-haiku-4-5.yaml
  so the claude runner can actually resolve this endpoint
- model-registry/harness-roles.yaml, model-registry/tiers.yaml,
  workflows/smart-agent.yaml, task-templates/workflow/{spec,plan}-review-loop@1.yaml:
  updated every claude-opus-4 / claude-sonnet-4 / claude-haiku-4 reference
  to the new slugs
- models/openrouter-sonnet.yaml: dated snapshot "claude-sonnet-4-20250514"
  -> "claude-sonnet-5" (third-party router proxying the same retired ID)
- refreshed cost_per_1k_tokens on the three renamed registry entries to
  current published pricing

Claude-Session: https://claude.ai/code/session_015nXvGNNNixJPFwZKZHNyha

model-registry/claude-haiku-4-5.yaml

@@ -1,5 +1,5 @@
-name: claude-haiku-4
-endpoint: claude-haiku-4
+name: claude-haiku-4-5
+endpoint: claude-haiku-4-5
 provider: anthropic
 scores:
   complexity: 5

model-registry/claude-opus-5.yaml

@@ -1,5 +1,5 @@
-name: claude-opus-4
-endpoint: claude-opus-4
+name: claude-opus-5
+endpoint: claude-opus-5
 provider: anthropic
 scores:
   complexity: 10
@@ -9,7 +9,7 @@ scores:
   cost_efficiency: 3
   context_utilisation: 10
 cost_per_1k_tokens:
-  input: 0.015
-  output: 0.075
+  input: 0.005
+  output: 0.025
 source: benchmark
 harness_version: null

model-registry/claude-sonnet-5.yaml

@@ -1,5 +1,5 @@
-name: claude-sonnet-4
-endpoint: claude-sonnet-4
+name: claude-sonnet-5
+endpoint: claude-sonnet-5
 provider: anthropic
 scores:
   complexity: 8
@@ -9,7 +9,7 @@ scores:
   cost_efficiency: 6
   context_utilisation: 8
 cost_per_1k_tokens:
-  input: 0.003
-  output: 0.015
+  input: 0.002
+  output: 0.01
 source: benchmark
 harness_version: null

model-registry/harness-roles.yaml

@@ -2,8 +2,8 @@ roles:
   code-tdd:
     airouter-qwen3: code-airouter-tdd-repo
     airouter-deepseekv4flash: code-airouter-deepseekv4flash-tdd-repo
-    claude-sonnet-4: code-sonnet-tdd-repo
-    claude-opus-4: code-opus-tdd-repo
-    claude-haiku-4: code-haiku-tdd-repo
+    claude-sonnet-5: code-sonnet-tdd-repo
+    claude-opus-5: code-opus-tdd-repo
+    claude-haiku-4-5: code-haiku-tdd-repo
     minimax: code-minimax-tdd-repo
     claude-fable-5: code-fable-tdd-repo

model-registry/tiers.yaml

@@ -23,7 +23,7 @@ tiers:
     qualifies_today:
       - deepseek-v4flash       # benchmark-inflated 9s; hold to allowed_models ceiling
       - minimax
-      - claude-opus-4
+      - claude-opus-5
     note: >
       WF-SCH-14 allowed_models ceiling remains authoritative until M7 observed-score
       recalibration corrects benchmark-inflated registry entries.
@@ -38,8 +38,8 @@ tiers:
       test_pass_rate: 9
     qualifies_today:
       - minimax
-      - claude-sonnet-4
-      - claude-opus-4
+      - claude-sonnet-5
+      - claude-opus-5
 
   coding:
     description: >
@@ -52,6 +52,6 @@ tiers:
       - airouter-qwen3
       - airouter-deepseekv4flash
       - minimax
-      - claude-sonnet-4
-      - claude-opus-4
+      - claude-sonnet-5
+      - claude-opus-5
       - claude-fable-5

models/claude-haiku-4-5.yaml

@@ -1,8 +1,8 @@
-name: claude-sonnet-4
+name: claude-haiku-4-5
 provider: anthropic
 endpoint:
   type: cloud_api
   api_key_env: ANTHROPIC_API_KEY
 runner: claude
 default_flags:
-  model: "claude-sonnet-4-20250514"
+  model: "claude-haiku-4-5"

models/claude-opus-5.yaml

@@ -1,8 +1,8 @@
-name: claude-opus-4
+name: claude-opus-5
 provider: anthropic
 endpoint:
   type: cloud_api
   api_key_env: ANTHROPIC_API_KEY
 runner: claude
 default_flags:
-  model: "claude-opus-4-5"
+  model: "claude-opus-5"

models/claude-sonnet-5.yaml

@@ -0,0 +1,8 @@
+name: claude-sonnet-5
+provider: anthropic
+endpoint:
+  type: cloud_api
+  api_key_env: ANTHROPIC_API_KEY
+runner: claude
+default_flags:
+  model: "claude-sonnet-5"

models/openrouter-sonnet.yaml

@@ -6,4 +6,4 @@ endpoint:
   api_key_env: OPENROUTER_API_KEY
 runner: agentic
 default_flags:
-  model: "anthropic/claude-sonnet-4-20250514"
+  model: "anthropic/claude-sonnet-5"

task-templates/workflow/plan-review-loop@1.yaml

@@ -19,7 +19,7 @@ nodes:
   - id: review-opus
     kind: agent
     role: plan-review  # M36 v0.6 (bug 69370eda fix)
-    model: claude-opus-4
+    model: claude-opus-5
     runtime_env:
       AGENT_REPO_URL: "git@gitea.oreillyit.nz-ai-enablement:skynet/agent-runtimes-agents.git"
       AGENT_BRANCH: "task/${item.uuid}"
@@ -93,7 +93,7 @@ nodes:
   - id: judge-haiku
     kind: agent
     role: plan-review
-    model: claude-haiku-4
+    model: claude-haiku-4-5
     depends_on: [improve-sonnet]
     runtime_env:
       AGENT_REPO_URL: "git@gitea.oreillyit.nz-ai-enablement:skynet/agent-runtimes-agents.git"

task-templates/workflow/spec-review-loop@1.yaml

@@ -24,7 +24,7 @@ nodes:
     role: spec-review  # M36 v0.6 (bug 69370eda fix): per-node role replaces
                        # the ungrounded top-level `runtime: review-loop-repo`.
                        # Harness resolution: (role, model) → composite.
-    model: claude-opus-4
+    model: claude-opus-5
     runtime_env:
       AGENT_REPO_URL: "git@gitea.oreillyit.nz-ai-enablement:skynet/agent-runtimes-agents.git"
       AGENT_BRANCH: "spec/${item.uuid}"
@@ -104,7 +104,7 @@ nodes:
   - id: judge-haiku
     kind: agent
     role: spec-review
-    model: claude-haiku-4
+    model: claude-haiku-4-5
     depends_on: [improve-sonnet]
     runtime_env:
       AGENT_REPO_URL: "git@gitea.oreillyit.nz-ai-enablement:skynet/agent-runtimes-agents.git"

workflows/smart-agent.yaml

@@ -2,7 +2,7 @@ name: smart-agent
 version: 1
 description: >
   High-capability single-agent workflow. Routes to the best available reasoning model
-  (complexity ≥ 9 — currently claude-opus-4). Use for complex implementation, planning,
+  (complexity ≥ 9 — currently claude-opus-5). Use for complex implementation, planning,
   or analysis tasks where quality matters more than cost.
 
   MiniMax is not in the model registry and will not be auto-selected; use the