fix: address code review — guard --downstream without --model, remove dead code

- Error when `--downstream` used without `--model` instead of silently
  triggering a full project build
- Remove unused `condition` field from `Suggestion` interface
- Rename misleading integration test names to match actual behavior
- Add test for `--downstream` without `--model` error case

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: anandgupta42

packages/dbt-tools/src/commands/build.ts

@@ -2,8 +2,11 @@ import type { DBTProjectIntegrationAdapter, CommandProcessResult } from "@altima
 
 export async function build(adapter: DBTProjectIntegrationAdapter, args: string[]) {
   const model = flag(args, "model")
-  if (!model) return project(adapter)
   const downstream = args.includes("--downstream")
+  if (!model) {
+    if (downstream) return { error: "--downstream requires --model" }
+    return project(adapter)
+  }
   const result = await adapter.unsafeBuildModelImmediately({
     plusOperatorLeft: "",
     modelName: model,

packages/dbt-tools/test/build.test.ts

@@ -45,6 +45,14 @@ describe("build command", () => {
     })
   })
 
+  test("build --downstream without --model returns error", async () => {
+    const adapter = makeAdapter()
+    const result = await build(adapter, ["--downstream"])
+    expect(result).toEqual({ error: "--downstream requires --model" })
+    expect(adapter.unsafeBuildProjectImmediately).not.toHaveBeenCalled()
+    expect(adapter.unsafeBuildModelImmediately).not.toHaveBeenCalled()
+  })
+
   test("build surfaces stderr as error", async () => {
     const adapter = makeAdapter({
       unsafeBuildProjectImmediately: mock(() =>

packages/opencode/src/skill/followups.ts

@@ -4,7 +4,6 @@ export namespace SkillFollowups {
     skill: string // skill name to suggest
     label: string // short display label
     description: string // why this is a good next step
-    condition?: string // optional: when this suggestion applies
   }
 
   // Map from skill name to follow-up suggestions

packages/opencode/test/skill/skill-followups-integration.test.ts

@@ -5,7 +5,7 @@ import { Instance } from "../../src/project/instance"
 import { tmpdir } from "../fixture/fixture"
 import path from "path"
 
-test("skill tool output includes follow-up suggestions for skills with followups", async () => {
+test("SkillFollowups.format returns follow-up suggestions for skills with followups", async () => {
   await using tmp = await tmpdir({
     git: true,
     init: async (dir) => {
@@ -40,7 +40,7 @@ Instructions here.
   })
 })
 
-test("skill tool output has no follow-ups for skills without followups defined", async () => {
+test("SkillFollowups.format returns empty for skills without followups defined", async () => {
   await using tmp = await tmpdir({
     git: true,
     init: async (dir) => {