diff --git a/apps/api/README.md b/apps/api/README.md
index efd8210..c8bf37a 100644
--- a/apps/api/README.md
+++ b/apps/api/README.md
@@ -16,9 +16,13 @@ Live at `https://srs-api.prdlk.workers.dev`.
   never overwrites SRS-owned columns (`stage`, `next_review`).
 - **The repo owns the schedule** — `data/schedule.json`, human-edited,
   bundled at deploy. Git history is its audit log.
-- The GitHub Project mirror (`Target Date`, `SRS Stage`, `First Attempt`)
-  is best-effort: failures log warnings, never block a D1 write. Topic rows
-  are never written.
+- The GitHub Project mirror writes `Target Date` and nothing else: it is
+  best-effort, so failures log warnings and never block a D1 write, and topic
+  rows are never written. SRS stage and first-attempt result stay in D1 only —
+  the charts, digest and `/api/stats` read them from there, so mirroring them
+  into Project single-selects bought only drift. Do not re-add them.
+  `Set`/`Difficulty` are a projection of the issue labels, reconciled by
+  `bun run sync-project-fields` at the repo root, not by this Worker.
 
 ## The ladder
 
diff --git a/apps/api/src/index.ts b/apps/api/src/index.ts
index d8a4f55..ff5c3a4 100644
--- a/apps/api/src/index.ts
+++ b/apps/api/src/index.ts
@@ -30,22 +30,16 @@ import { buildStats } from "./stats.ts";
 
 // ── shared side effects after a state write ──────────────────────
 
-/** Project-field half of a mirror; shared by every write path. */
-async function mirrorFields(mirror: Mirror, outcome: LogOutcome): Promise<void> {
-  await mirror.setStage(outcome.issue, outcome.stage);
-  await mirror.setTargetDate(outcome.issue, outcome.next_review);
-  if (outcome.first) await mirror.setFirstAttempt(outcome.issue, outcome.result);
-}
-
 /**
- * Mirror one logged attempt into GitHub: Project fields always; on a
+ * Mirror one logged attempt into GitHub: the Project's Target Date always; on a
  * first-ever pass also close the problem's sub-issue (comment first — repo
  * convention). Runs inside ctx.waitUntil; failures are warnings.
  */
 async function mirrorOutcome(env: Env, outcome: LogOutcome, source: string): Promise<void> {
   if (outcome.error || outcome.duplicate) return;
   const gh = github(env.GH_PAT, env.REPO);
-  await mirrorFields(projectMirror(gh, env.REPO.split("/")[0]!), outcome);
+  const mirror = projectMirror(gh, env.REPO.split("/")[0]!);
+  await mirror.setTargetDate(outcome.issue, outcome.next_review);
   if (outcome.first && outcome.result === "pass") {
     try {
       await gh.closeIssue(
@@ -248,7 +242,7 @@ async function handleSolved(request: Request, env: Env, date: string): Promise<R
       logged.push(outcomeLine(outcome));
       // One mirror for the batch: field IDs resolve once, not per problem.
       mirror ??= projectMirror(github(env.GH_PAT, env.REPO), env.REPO.split("/")[0]!);
-      await mirrorFields(mirror, outcome);
+      await mirror.setTargetDate(outcome.issue, outcome.next_review);
     }
   }
   return Response.json({ date, logged, skipped, warnings: mirror?.warnings ?? [] });
diff --git a/apps/api/src/mirror.ts b/apps/api/src/mirror.ts
index 9899513..5c18ddc 100644
--- a/apps/api/src/mirror.ts
+++ b/apps/api/src/mirror.ts
@@ -4,30 +4,26 @@
  * console warning and never blocks a state write. Only problem issues are
  * ever passed in, so topic rows' Target Date is never written.
  *
- * Field/option IDs are resolved by NAME per invocation (a Worker isolate is
- * short-lived; the two extra queries per mirror burst are irrelevant at this
- * volume and survive field re-creation).
+ * Target Date is the ONLY mirrored column. SRS stage and first-attempt result
+ * live exclusively in D1 — they are read from there (charts, digest, /api/stats)
+ * and duplicating them into Project single-selects bought nothing but drift and
+ * two extra writes per log. Do not re-add them here.
+ *
+ * Field IDs are resolved by NAME per invocation (a Worker isolate is
+ * short-lived; the extra query per mirror burst is irrelevant at this
+ * volume and survives field re-creation).
  */
 import type { GitHub } from "./github.ts";
 
 const PROJECT_TITLE = "Interview Prep";
 
-interface SelectField {
-  id: string;
-  options: Record<string, string>;
-}
-
 interface ProjectInfo {
   id: string;
   targetDate: string;
-  srsStage: SelectField;
-  firstAttempt: SelectField;
 }
 
 export interface Mirror {
   setTargetDate(issue: number, date: string | null): Promise<void>;
-  setStage(issue: number, stage: string): Promise<void>;
-  setFirstAttempt(issue: number, result: string): Promise<void>;
   warnings: string[];
 }
 
@@ -47,7 +43,6 @@ export function projectMirror(gh: GitHub, owner: string): Mirror {
               fields(first: 30) {
                 nodes {
                   ... on ProjectV2FieldCommon { id name dataType }
-                  ... on ProjectV2SingleSelectField { id name options { id name } }
                 }
               }
             }
@@ -62,7 +57,7 @@ export function projectMirror(gh: GitHub, owner: string): Mirror {
             id: string;
             title: string;
             fields: {
-              nodes: { id: string; name: string; options?: { id: string; name: string }[] }[];
+              nodes: { id: string; name: string }[];
             };
           }[];
         };
@@ -70,19 +65,9 @@ export function projectMirror(gh: GitHub, owner: string): Mirror {
     };
     const node = data.user.projectsV2.nodes.find((n) => n.title === PROJECT_TITLE);
     if (!node) throw new Error(`project "${PROJECT_TITLE}" not found for @${owner}`);
-    const select = (name: string): SelectField => {
-      const f = node.fields.nodes.find((n) => n.name === name);
-      if (!f?.options) throw new Error(`single-select field "${name}" missing`);
-      return { id: f.id, options: Object.fromEntries(f.options.map((o) => [o.name, o.id])) };
-    };
     const date = node.fields.nodes.find((n) => n.name === "Target Date");
     if (!date) throw new Error(`date field "Target Date" missing`);
-    info = {
-      id: node.id,
-      targetDate: date.id,
-      srsStage: select("SRS Stage"),
-      firstAttempt: select("First Attempt"),
-    };
+    info = { id: node.id, targetDate: date.id };
     return info;
   }
 
@@ -154,19 +139,5 @@ export function projectMirror(gh: GitHub, owner: string): Mirror {
           await setField(issue, project.targetDate, { date });
         }
       }),
-    setStage: (issue, stage) =>
-      attempt(`SRS Stage #${issue}`, async () => {
-        const project = await resolve();
-        const option = project.srsStage.options[stage];
-        if (!option) throw new Error(`no option "${stage}"`);
-        await setField(issue, project.srsStage.id, { singleSelectOptionId: option });
-      }),
-    setFirstAttempt: (issue, result) =>
-      attempt(`First Attempt #${issue}`, async () => {
-        const project = await resolve();
-        const option = project.firstAttempt.options[result];
-        if (!option) throw new Error(`no option "${result}"`);
-        await setField(issue, project.firstAttempt.id, { singleSelectOptionId: option });
-      }),
   };
 }