From 51e4c9fc4cb4ef01f7d337127b463729c2967594 Mon Sep 17 00:00:00 2001
From: Filip <34747899+neriousy@users.noreply.github.com>
Date: Fri, 31 Oct 2025 05:35:26 +0100
Subject: [PATCH] add optional headers field to model config  (#3546)

---
 packages/opencode/src/provider/models.ts    | 1 +
 packages/opencode/src/provider/provider.ts  | 1 +
 packages/opencode/src/session/compaction.ts | 1 +
 packages/opencode/src/session/prompt.ts     | 9 ++++++---
 packages/opencode/src/session/summary.ts    | 2 ++
 5 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/packages/opencode/src/provider/models.ts b/packages/opencode/src/provider/models.ts
index 4981d38b..34640706 100644
--- a/packages/opencode/src/provider/models.ts
+++ b/packages/opencode/src/provider/models.ts
@@ -37,6 +37,7 @@ export namespace ModelsDev {
       experimental: z.boolean().optional(),
       status: z.enum(["alpha", "beta"]).optional(),
       options: z.record(z.string(), z.any()),
+      headers: z.record(z.string(), z.string()).optional(),
       provider: z.object({ npm: z.string() }).optional(),
     })
     .meta({
diff --git a/packages/opencode/src/provider/provider.ts b/packages/opencode/src/provider/provider.ts
index c42b361b..9bcff4b4 100644
--- a/packages/opencode/src/provider/provider.ts
+++ b/packages/opencode/src/provider/provider.ts
@@ -306,6 +306,7 @@ export namespace Provider {
               input: ["text"],
               output: ["text"],
             },
+          headers: model.headers,
           provider: model.provider ?? existing?.provider,
         }
         if (model.id && model.id !== modelID) {
diff --git a/packages/opencode/src/session/compaction.ts b/packages/opencode/src/session/compaction.ts
index 4896d5f5..116a7e39 100644
--- a/packages/opencode/src/session/compaction.ts
+++ b/packages/opencode/src/session/compaction.ts
@@ -150,6 +150,7 @@ export namespace SessionCompaction {
         maxRetries: 0,
         model: model.language,
         providerOptions: ProviderTransform.providerOptions(model.npm, model.providerID, model.info.options),
+        headers: model.info.headers,
         abortSignal: signal,
         onError(error) {
           log.error("stream error", {
diff --git a/packages/opencode/src/session/prompt.ts b/packages/opencode/src/session/prompt.ts
index 080f9d99..c6e0ad58 100644
--- a/packages/opencode/src/session/prompt.ts
+++ b/packages/opencode/src/session/prompt.ts
@@ -270,13 +270,15 @@ export namespace SessionPrompt {
               toolName: "invalid",
             }
           },
-          headers:
-            model.providerID === "opencode"
+          headers: {
+            ...(model.providerID === "opencode"
               ? {
                   "x-opencode-session": input.sessionID,
                   "x-opencode-request": userMsg.info.id,
                 }
-              : undefined,
+              : undefined),
+            ...model.info.headers,
+          },
           // set to 0, we handle loop
           maxRetries: 0,
           activeTools: Object.keys(tools).filter((x) => x !== "invalid"),
@@ -1816,6 +1818,7 @@ export namespace SessionPrompt {
           },
         ]),
       ],
+      headers: small.info.headers,
       model: small.language,
     })
       .then((result) => {
diff --git a/packages/opencode/src/session/summary.ts b/packages/opencode/src/session/summary.ts
index 115fbe45..12b040f6 100644
--- a/packages/opencode/src/session/summary.ts
+++ b/packages/opencode/src/session/summary.ts
@@ -84,6 +84,7 @@ export namespace SessionSummary {
             content: textPart?.text ?? "",
           },
         ],
+        headers:small.info.headers,
         model: small.language,
       })
       log.info("title", { title: result.text })
@@ -116,6 +117,7 @@ export namespace SessionSummary {
             `,
             },
           ],
+          headers: small.info.headers
         })
         summary = result.text
       }