refactor(tui): simplify command file deduplication

packages/opencode/src/session/prompt.ts

@@ -1558,18 +1558,7 @@ export const layer = Layer.effect(
       }
 
       const templateParts = yield* resolvePromptParts(template)
-      const stripParams = (url: string) => {
-        const u = new URL(url)
-        u.search = ""
-        u.hash = ""
-        return u.href
-      }
-      const inputFileUrls = new Set(
-        (input.parts ?? []).flatMap((p) => (p.type === "file" ? [stripParams(p.url)] : [])),
-      )
-      const dedupedTemplateParts = templateParts.filter(
-        (p) => !(p.type === "file" && inputFileUrls.has(stripParams(p.url))),
-      )
+      const inputFiles = new Set(input.parts?.map((part) => new URL(part.url).pathname))
       const isSubtask = (agent.mode === "subagent" && cmd.subtask !== false) || cmd.subtask === true
       const parts = isSubtask
         ? [
@@ -1582,7 +1571,10 @@ export const layer = Layer.effect(
               prompt: templateParts.find((y) => y.type === "text")?.text ?? "",
             },
           ]
-        : [...dedupedTemplateParts, ...(input.parts ?? [])]
+        : [
+            ...templateParts.filter((part) => part.type !== "file" || !inputFiles.has(new URL(part.url).pathname)),
+            ...(input.parts ?? []),
+          ]
 
       const userAgent = isSubtask ? (input.agent ?? (yield* agents.defaultInfo()).name) : agent.name
       const userModel = isSubtask

packages/opencode/test/session/prompt.test.ts

@@ -2316,56 +2316,3 @@ noLLMServer.instance(
     }),
   30_000,
 )
-
-it.instance(
-  "command deduplicates file parts from $ARGUMENTS and input parts",
-  () =>
-    Effect.gen(function* () {
-      const { dir, llm } = yield* useServerConfig((url) => ({
-        ...providerCfg(url),
-        command: {
-          testdedup: {
-            template: "Read $ARGUMENTS",
-            description: "Test command for file dedup",
-          },
-        },
-      }))
-      const prompt = yield* SessionPrompt.Service
-      const sessions = yield* Session.Service
-      const session = yield* sessions.create({ title: "File dedup test" })
-
-      const testFile = path.join(dir, "dedup-test.txt")
-      yield* writeText(testFile, "dedup-content")
-
-      yield* llm.text("done")
-
-      const result = yield* prompt.command({
-        sessionID: session.id,
-        command: "testdedup",
-        arguments: "@dedup-test.txt",
-        parts: [
-          {
-            type: "file",
-            url: pathToFileURL(testFile).href,
-            filename: "dedup-test.txt",
-            mime: "text/plain",
-          },
-        ],
-      })
-
-      expect(result.info.role).toBe("assistant")
-
-      const msgs = yield* sessions.messages({ sessionID: session.id })
-      const userMsg = msgs.findLast((msg) => msg.info.role === "user")
-      expect(userMsg?.info.role).toBe("user")
-      if (userMsg?.info.role !== "user") return
-
-      const syntheticTexts = userMsg.parts.filter(
-        (part): part is SessionV1.TextPart => part.type === "text" && "synthetic" in part && part.synthetic === true,
-      )
-      const contentCount = syntheticTexts.filter((part) => part.text.includes("dedup-content")).length
-      expect(contentCount).toBe(1)
-    }),
-  { config: cfg },
-  30_000,
-)