refactor(custom-model): keep the DeepSeek patch rewrite on its own branch

src/config/cli-registry/schema.ts

@@ -580,7 +580,7 @@ const capabilitiesSchema = z
           kind: z.literal('configDir'),
           dirEnvVar: envName,
           fileName: z.string().min(1).max(80),
-          template: z.enum(['codex-toml', 'pi-models-json', 'omp-models-yml', 'grok-toml', 'deepseek-patch-json']),
+          template: z.enum(['codex-toml', 'pi-models-json', 'omp-models-yml', 'grok-toml']),
           launchModel: launchModelTemplate,
         })
         .strict(),

src/config/cli-registry/stock.ts

@@ -1548,12 +1548,28 @@ const DEEPSEEK: CliEntry = {
     // privilege rather than granting it, and clamping it here was a real regression
     // (test/deepseek-mode.test.ts) fixed before this shipped.
     privilegedEnvKeys: ['DSH_PERMISSION_MODE', 'DSH_HOME', 'DEEPSEEK_BASE_URL'],
-    // The installed profile supplies the transport; a per-session patch selects its exact model.
+    // Reuses the already-existing DEEPSEEK_BASE_URL/DEEPSEEK_API_KEY keys above. No
+    // modelVars — dsh's model is a profile-composition entry (see `model: { source: 'none'
+    // }` above), not an env var, so forcing a specific model name may not fully work;
+    // verify against a real profile before shipping.
+    //
+    // ⚠️ appendV1Suffix is REQUIRED, not optional-nice-to-have: without it every request
+    // 404s. Confirmed live and by reading dsh's own bundled source
+    // (@deepseek-ai/dsh-llm-deepseek): it builds the request URL as
+    // `${DEEPSEEK_BASE_URL}/chat/completions` with no "/v1" of its own (its real public
+    // API, https://api.deepseek.com, expects the caller's base URL to already carry any
+    // needed prefix), while llama-swap/llama.cpp only serves the OpenAI-conventional
+    // "/v1/chat/completions" — a bare POST to ".../chat/completions" 404s live, and the
+    // 404 reported here originally ("dsh: HTTP_404: DeepSeek API error (HTTP 404)")
+    // matches dsh's own error-message template for exactly this failure. See the
+    // customModelInjection doc comment in cli-registry/types.ts for the full reasoning,
+    // including why claude/gemini must NOT get this.
     customModelInjection: {
-      kind: 'configDir',
-      dirEnvVar: 'DSH_HOME',
-      fileName: 'cordis.patch.yml',
-      template: 'deepseek-patch-json',
+      kind: 'env',
+      baseUrlVar: 'DEEPSEEK_BASE_URL',
+      apiKeyVar: 'DEEPSEEK_API_KEY',
+      modelVars: [],
+      appendV1Suffix: true,
     },
   },
   overlays: {

src/config/cli-registry/types.ts

@@ -888,7 +888,7 @@ export interface CliCapabilities {
         kind: 'configDir';
         dirEnvVar: string;
         fileName: string;
-        template: 'codex-toml' | 'pi-models-json' | 'omp-models-yml' | 'grok-toml' | 'deepseek-patch-json';
+        template: 'codex-toml' | 'pi-models-json' | 'omp-models-yml' | 'grok-toml';
         launchModel?: string;
       }
     | { kind: 'unsupported' };