Commits of agents carry a co-author trailer naming the model

A git wrapper (docker/git-coauthor -> /usr/local/lib/codecraft/bin/git) adds
--trailer "$CODECRAFT_COMMIT_TRAILER" right after the commit subcommand; the
agent shell puts it first on PATH and sets the trailer in the script itself
(works inside the sandbox, which clears the environment). Default text:
"Co-Authored-By: {model} ({provider}) via CodeCraft" (server.commit_trailer,
Settings -> General; empty = off). Git skips duplicates (amend, model wrote it).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/components/Settings.tsx

@@ -248,6 +248,7 @@ function General({ cfg, reload }: { cfg: ConfigResponse; reload: () => void }) {
     small_model: s.small_model ?? "",
     currency: s.currency ?? "USD",
     auto_compact_threshold: s.auto_compact_threshold ?? 0.85,
+    commit_trailer: ((s as any).commit_trailer ?? "Co-Authored-By: {model} ({provider}) via CodeCraft") as string,
     max_parallel_subagents: s.max_parallel_subagents ?? 4,
     monthly_budget: s.monthly_budget ?? 0,
     budget_warning: s.budget_warning ?? 0.8,
@@ -271,6 +272,7 @@ function General({ cfg, reload }: { cfg: ConfigResponse; reload: () => void }) {
         { path: ["server", "small_model"], value: form.small_model },
         { path: ["server", "currency"], value: form.currency },
         { path: ["server", "auto_compact_threshold"], value: Number(form.auto_compact_threshold) },
+        { path: ["server", "commit_trailer"], value: form.commit_trailer.trim() },
         { path: ["server", "max_parallel_subagents"], value: Number(form.max_parallel_subagents) },
         { path: ["server", "monthly_budget"], value: Number(form.monthly_budget) || 0 },
         { path: ["server", "budget_warning"], value: Number(form.budget_warning) || 0.8 },
@@ -305,6 +307,9 @@ function General({ cfg, reload }: { cfg: ConfigResponse; reload: () => void }) {
           <label>{t("settings.autoCompact")}</label>
           <input type="number" min={0} max={1} step={0.05} value={form.auto_compact_threshold} onChange={(e) => setForm({ ...form, auto_compact_threshold: e.target.value })} />
           <div className="hint">{t("settings.autoCompactHint")}</div>
+          <label>{t("settings.commitTrailer")}</label>
+          <input className="mono" value={form.commit_trailer} placeholder={t("settings.commitTrailerOff")} onChange={(e) => setForm({ ...form, commit_trailer: e.target.value })} />
+          <div className="hint">{t("settings.commitTrailerHint")}</div>
           <label>{t("settings.monthlyBudgetTotal")}</label>
           <input type="number" min={0} value={form.monthly_budget} onChange={(e) => setForm({ ...form, monthly_budget: e.target.value })} />
           <div className="hint">{t("settings.monthlyBudgetHint")}</div>

web/src/i18n/de.ts

@@ -770,6 +770,9 @@ export const de: Messages = {
   "settings.smallModelHint": "Für Session-Titel. Die Komprimierung nutzt das Session-Modell.",
   "settings.currency": "Währung",
   "settings.autoCompact": "Auto-Komprimierung bei",
+  "settings.commitTrailer": "Commit-Vermerk der Agenten",
+  "settings.commitTrailerOff": "aus",
+  "settings.commitTrailerHint": "Wird als Trailer an jeden Git-Commit eines Agenten angehängt. {model} = Modellname, {provider} = Anbieter, {model_id} = Modell-ID. Leer = aus. Deine eigenen Commits bleiben unverändert.",
   "settings.autoCompactHint": "Anteil des Kontextfensters (0 = aus).",
   "settings.craft": "Craft-Modus",
   "settings.cleanRoom": "Clean Room",

web/src/i18n/en.ts

@@ -769,6 +769,9 @@ export const en = {
   "settings.smallModelHint": "Used for session titles. Compaction uses the session model.",
   "settings.currency": "Currency",
   "settings.autoCompact": "Auto-compact at",
+  "settings.commitTrailer": "Commit note of agents",
+  "settings.commitTrailerOff": "off",
+  "settings.commitTrailerHint": "Added as a trailer to every git commit an agent makes. {model} = model name, {provider} = provider, {model_id} = model id. Empty = off. Your own commits stay unchanged.",
   "settings.autoCompactHint": "Fraction of the context window (0 = off).",
   "settings.craft": "Craft mode",
   "settings.cleanRoom": "Clean room",

web/src/whatsnew.ts

@@ -3,6 +3,10 @@
  * under "unreleased"; scripts/release.sh renames the key to the release version.
  */
 export const WHATS_NEW: Record<string, { en: string[]; de: string[] }> = {
+  unreleased: {
+    en: ["Git commits of agents name the model: “Co-Authored-By: <model> (<provider>) via CodeCraft” (Settings → General)"],
+    de: ["Git-Commits von Agenten nennen das Modell: „Co-Authored-By: <Modell> (<Anbieter>) via CodeCraft“ (Einstellungen → Allgemein)"],
+  },
   "202611-00020": {
     en: ["Reverse engineering: decompile with Ghidra can be enabled for any mode (Settings → Agents & commands), now also for raw firmware"],
     de: ["Reverse Engineering: Dekompilieren mit Ghidra lässt sich für jeden Modus einschalten (Einstellungen → Agenten & Befehle), jetzt auch für rohe Firmware"],