diff --git a/CLAUDE.md b/CLAUDE.md
index ee43bf4..7b49f47 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -23,7 +23,10 @@ node index.js --max-resources --no-copy < save.txt
 
 Saves are LZString `compressToBase64` of a JSON object (not plain base64). Uses the `lz-string` npm package to match the game's own JS implementation.
 
-Key top-level sections: `resource`, `race`, `tech`, `city`, `space`, `civic`, `genes`, `prestige`, `settings`, `arpa`.
+Key top-level sections: `resource`, `race`, `tech`, `city`, `space`, `civic`, `genes`, `prestige`, `settings`, `arpa`, `pillars`.
+
+### Pillars (`pillars`)
+Flat map of `<species key>: <rank>` — only species with a pillar appear. Rank is the ascension `alevel()` (1–5, +1 per challenge gene active on that run), *not* the universe. 63 species total (all races except `protoplasm`); the race table lives in `RACES` in `index.js`, mirrored from the game's `src/races.js`. Pillar bonus: +1% production / +2% storage per pillar, with the currently-played species counting 4×.
 
 ### Prestige structure (`prestige.<name>`)
 - `count`: current value
diff --git a/README.md b/README.md
index b789443..e0ccedf 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,12 @@ Pass flags for non-interactive, scriptable usage. Reads save data from your **cl
 # List all resources and their current values
 node index.js --list
 
+# Show which species already have a pillar in the Circle of Pillars
+node index.js --pillars
+
+# Same, but also list the species still missing a pillar
+node index.js --pillars-all
+
 # Max all capped resources
 node index.js --max-resources
 
@@ -61,6 +67,8 @@ node index.js --max-resources --no-copy
 | Flag | Description |
 |------|-------------|
 | `--list` | List all resources in the save, grouped by type (capped, crafted, special, locked) |
+| `--pillars` | Show Circle of Pillars progress: pillared species grouped by genus, with their rank |
+| `--pillars-all` | Same as `--pillars`, but also lists species that have no pillar yet |
 | `--max-resources` | Set all capped resources (`max > 0`) to their max |
 | `--set=key=N` | Set a specific resource or prestige currency to N (e.g. `--set=Plasmid=100`). Case-insensitive. Can be used multiple times. |
 | `--set-crafted=N` | Set all unlimited/crafted resources (`max == -1`) to N |
diff --git a/index.js b/index.js
index f79e934..21a450d 100644
--- a/index.js
+++ b/index.js
@@ -142,6 +142,151 @@ function setGeology(data) {
   return `Set 4 geology bonuses (max +${(maxBonus * 100).toFixed(0)}% from White Hole level ${whLevel}):\n${entries}`;
 }
 
+// All pillar-able species (every race except protoplasm), in game order.
+// Pillar count target for the Circle of Pillars is RACES.size (63).
+const RACES = {
+  human: { name: "Human", genus: "humanoid" },
+  elven: { name: "Elf", genus: "humanoid" },
+  orc: { name: "Orc", genus: "humanoid" },
+  cath: { name: "Cath", genus: "carnivore" },
+  wolven: { name: "Wolven", genus: "carnivore" },
+  vulpine: { name: "Vulpine", genus: "carnivore" },
+  centaur: { name: "Centaur", genus: "herbivore" },
+  rhinotaur: { name: "Rhinotaur", genus: "herbivore" },
+  capybara: { name: "Capybara", genus: "herbivore" },
+  porkenari: { name: "Porkenari", genus: "omnivore" },
+  hedgeoken: { name: "Hedgeoken", genus: "omnivore" },
+  kobold: { name: "Kobold", genus: "small" },
+  goblin: { name: "Goblin", genus: "small" },
+  gnome: { name: "Gnome", genus: "small" },
+  ogre: { name: "Ogre", genus: "giant" },
+  cyclops: { name: "Cyclops", genus: "giant" },
+  troll: { name: "Troll", genus: "giant" },
+  tortoisan: { name: "Tortoisan", genus: "reptilian" },
+  gecko: { name: "Gecko", genus: "reptilian" },
+  slitheryn: { name: "Slitheryn", genus: "reptilian" },
+  arraak: { name: "Arraak", genus: "avian" },
+  pterodacti: { name: "Pterodacti", genus: "avian" },
+  dracnid: { name: "Dracnid", genus: "avian" },
+  entish: { name: "Ent", genus: "plant" },
+  cacti: { name: "Cacti", genus: "plant" },
+  pinguicula: { name: "Pinguicula", genus: "plant" },
+  sporgar: { name: "Sporgar", genus: "fungi" },
+  shroomi: { name: "Shroomi", genus: "fungi" },
+  moldling: { name: "Moldling", genus: "fungi" },
+  mantis: { name: "Mantis", genus: "insectoid" },
+  scorpid: { name: "Scorpid", genus: "insectoid" },
+  antid: { name: "Antid", genus: "insectoid" },
+  sharkin: { name: "Sharkin", genus: "aquatic" },
+  octigoran: { name: "Octigoran", genus: "aquatic" },
+  dryad: { name: "Dryad", genus: "fey" },
+  satyr: { name: "Satyr", genus: "fey" },
+  phoenix: { name: "Phoenix", genus: "heat" },
+  salamander: { name: "Salamander", genus: "heat" },
+  yeti: { name: "Yeti", genus: "polar" },
+  wendigo: { name: "Wendigo", genus: "polar" },
+  tuskin: { name: "Tuskin", genus: "sand" },
+  kamel: { name: "Kamel", genus: "sand" },
+  balorg: { name: "Balorg", genus: "demonic" },
+  imp: { name: "Imp", genus: "demonic" },
+  hellspawn: { name: "Hellspawn", genus: "demonic" },
+  seraph: { name: "Seraph", genus: "angelic" },
+  unicorn: { name: "Unicorn", genus: "angelic" },
+  synth: { name: "Synth", genus: "synthetic" },
+  nano: { name: "Nano", genus: "synthetic" },
+  ghast: { name: "Ghast", genus: "eldritch" },
+  shoggoth: { name: "Shoggoth", genus: "eldritch" },
+  dwarf: { name: "Dwarf", genus: "hybrid" },
+  raccoon: { name: "Racconar", genus: "hybrid" },
+  lichen: { name: "Lichen", genus: "hybrid" },
+  wyvern: { name: "Wyvern", genus: "hybrid" },
+  beholder: { name: "Eye-Spector", genus: "hybrid" },
+  djinn: { name: "Djinn", genus: "hybrid" },
+  narwhal: { name: "Narwhalus", genus: "hybrid" },
+  bombardier: { name: "Bombardier", genus: "hybrid" },
+  nephilim: { name: "Nephilim", genus: "hybrid" },
+  junker: { name: "Valdi", genus: "special" },
+  sludge: { name: "Sludge", genus: "special" },
+  ultra_sludge: { name: "Ultra Sludge", genus: "special" },
+};
+
+const GENUS_NAMES = {
+  humanoid: "Humanoid",
+  carnivore: "Carnivore",
+  herbivore: "Herbivore",
+  omnivore: "Omnivore",
+  small: "Small",
+  giant: "Giant",
+  reptilian: "Reptilian",
+  avian: "Avian",
+  plant: "Plant",
+  fungi: "Fungi",
+  insectoid: "Insectoid",
+  aquatic: "Aquatic",
+  fey: "Fey",
+  heat: "Heat",
+  polar: "Polar",
+  sand: "Sand",
+  demonic: "Demonic",
+  angelic: "Angelic",
+  synthetic: "Synthetic",
+  eldritch: "Eldritch",
+  hybrid: "Hybrid",
+  special: "Special",
+};
+
+function listPillars(data, showAll) {
+  const pillars = data.pillars || {};
+  const current = data.race?.species;
+  const total = Object.keys(RACES).length;
+  const owned = Object.keys(pillars).filter((k) => pillars[k]);
+
+  if (owned.length === 0 && !showAll) {
+    console.log("No pillars in this save (Circle of Pillars not started).");
+    return;
+  }
+
+  // Group races by genus, keeping game order within each genus
+  const byGenus = {};
+  for (const [key, race] of Object.entries(RACES)) {
+    (byGenus[race.genus] ||= []).push(key);
+  }
+
+  console.log(`Circle of Pillars: ${owned.length} / ${total} species pillared\n`);
+
+  for (const [genus, keys] of Object.entries(byGenus)) {
+    const done = keys.filter((k) => pillars[k]);
+    if (done.length === 0 && !showAll) continue;
+
+    const label = GENUS_NAMES[genus] || genus;
+    console.log(`${label} (${done.length}/${keys.length}):`);
+    for (const key of keys) {
+      const rank = pillars[key];
+      const name = RACES[key].name;
+      const marker = key === current ? " <- current species" : "";
+      if (rank) {
+        console.log(`  [x] ${name} (${key}) - rank ${rank}${marker}`);
+      } else if (showAll) {
+        console.log(`  [ ] ${name} (${key})${marker}`);
+      }
+    }
+  }
+
+  // Unknown keys (custom races or races added after this list was built)
+  const unknown = owned.filter((k) => !RACES[k]);
+  if (unknown.length > 0) {
+    console.log(`Unrecognized (custom?) species:`);
+    unknown.forEach((k) => console.log(`  [x] ${k} - rank ${pillars[k]}`));
+  }
+
+  // Pillar bonus: +1% production / +2% storage per pillar, current species counts 4x
+  const active = owned.reduce((sum, k) => sum + (k === current ? 4 : 1), 0);
+  console.log(`\nPillar bonus: +${active}% production, +${active * 2}% storage`);
+  if (!showAll) {
+    console.log(`${total - owned.length} species still missing (use --pillars-all to list them).`);
+  }
+}
+
 function readFromClipboard() {
   try {
     return execSync("pbpaste", { encoding: "utf-8" }).trim();
@@ -226,7 +371,9 @@ function main() {
     }
   }
 
-  const hasAction = flags.has("--max-resources") || flags.has("--max-time") || flags.has("--max-geology") || flags.has("--max-soldiers") || flags.has("--list") || craftedValue !== null || setValues.length > 0;
+  const mutates = flags.has("--max-resources") || flags.has("--max-time") || flags.has("--max-geology") || flags.has("--max-soldiers") || craftedValue !== null || setValues.length > 0;
+  const inspects = flags.has("--list") || flags.has("--pillars") || flags.has("--pillars-all");
+  const hasAction = mutates || inspects;
 
   if (flags.has("--help")) {
     console.log(`Usage: node index.js [options] [save-string]
@@ -235,6 +382,8 @@ Running with no flags launches interactive mode.
 
 Options:
   --list               List all resources in the save with current values
+  --pillars            Show which species have a pillar in the Circle of Pillars
+  --pillars-all        Same, but also list species without a pillar
   --max-resources      Set all capped resources to their max
   --set=key=N          Set a specific resource to N (e.g. --set=Plasmid=100)
   --set-crafted=N      Set all unlimited (crafted) resources to N
@@ -262,9 +411,14 @@ Save string can be passed as argument, piped via stdin, or read from clipboard.`
 
   if (flags.has("--list")) {
     listResources(data);
-    if (!flags.has("--max-resources") && !flags.has("--max-soldiers") && !flags.has("--max-geology") && !flags.has("--max-time") && craftedValue === null) {
-      process.exit(0);
-    }
+  }
+
+  if (flags.has("--pillars") || flags.has("--pillars-all")) {
+    listPillars(data, flags.has("--pillars-all"));
+  }
+
+  if (inspects && !mutates) {
+    process.exit(0);
   }
 
   if (flags.has("--max-resources")) {
@@ -406,6 +560,7 @@ async function interactiveMode() {
         { value: "max-geology", name: "Max geology bonuses" },
         { value: "max-time", name: "Max accelerated time" },
         { value: "list", name: "List all resources" },
+        { value: "pillars", name: "Show Circle of Pillars progress" },
         ...(modified ? [{ value: "save", name: "Save & copy to clipboard" }] : []),
         { value: "exit", name: "Exit" },
       ],
@@ -429,6 +584,12 @@ async function interactiveMode() {
       continue;
     }
 
+    if (action === "pillars") {
+      const showAll = await confirm({ message: "Also show species without a pillar?", default: false });
+      listPillars(data, showAll);
+      continue;
+    }
+
     if (action === "max-time") {
       const MAX_AT = 11520;
       const old = data.settings?.at ?? 0;