diff --git a/README.md b/README.md
index 5a64c2d..50927b6 100644
--- a/README.md
+++ b/README.md
@@ -243,7 +243,7 @@ different band is worth a great deal — see
 
 ## Star history
 
-<img src="docs/star-history.svg" alt="Star history for edge, protocol and analytics" width="760">
+<img src="docs/star-history.svg" alt="Star history for OpenStrap/edge" width="760">
 
 That cliff in mid-July is [Hackaday](https://hackaday.com/2026/07/15/making-a-locked-down-wearable-work-without-a-subscription/)
 and [Adafruit](https://blog.adafruit.com/2026/07/15/openstrap-edge-makes-a-whoop-4-0-band-useful-without-a-subscription)
@@ -253,7 +253,9 @@ covering it on the same day.
 ([workflow](.github/workflows/star-history.yml)) rather than embedded from
 star-history.com or starchart.cc — the first refuses these repos outright, the
 second rate-limits, and neither should be making a request from a page about
-keeping your data to yourself.</sub>
+keeping your data to yourself. Charts this repo only: a workflow's built-in token
+can't read sibling repos. Set `STAR_HISTORY_REPOS` with a cross-repo PAT to add
+them.</sub>
 
 ## Support the work
 
diff --git a/docs/index.html b/docs/index.html
index 831a443..29d3911 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -150,7 +150,7 @@ <h2>How it&rsquo;s put together</h2>
 
     <section class="growth">
       <h2>Where it&rsquo;s got to</h2>
-      <img src="star-history.svg" alt="Star history for edge, protocol and analytics"
+      <img src="star-history.svg" alt="Star history for OpenStrap/edge"
            width="760" loading="lazy">
       <p class="fineprint">
         The cliff in mid-July is Hackaday and Adafruit covering it on the same day.
diff --git a/docs/star-history.svg b/docs/star-history.svg
index c06f822..49c1a56 100644
--- a/docs/star-history.svg
+++ b/docs/star-history.svg
@@ -16,13 +16,7 @@
 <text class="tick" x="52" y="288" font-size="11" text-anchor="start">Mar 2026</text>
 <text class="tick" x="744" y="288" font-size="11" text-anchor="end">Jul 2026</text>
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177.4 H 519.6 V 176.7 H 519.8 V 176.0 H 523.9 V 175.3 H 528.1 V 174.6 H 528.1 V 173.9 H 531.6 V 173.2 H 534.7 V 172.5 H 537.4 V 171.8 H 541.4 V 171.1 H 541.9 V 170.3 H 542.3 V 169.6 H 542.3 V 168.9 H 545.8 V 168.2 H 548.5 V 167.5 H 550.0 V 166.8 H 565.2 V 166.1 H 565.4 V 165.4 H 567.8 V 164.7 H 570.6 V 164.0 H 577.2 V 163.3 H 577.6 V 162.5 H 580.7 V 161.8 H 585.2 V 161.1 H 585.6 V 160.4 H 587.3 V 159.7 H 588.1 V 159.0 H 589.0 V 158.3 H 596.0 V 157.6 H 596.5 V 156.9 H 602.1 V 156.2 H 619.1 V 155.5 H 626.3 V 154.8 H 631.3 V 154.0 H 632.6 V 153.3 H 632.8 V 152.6 H 637.1 V 151.9 H 638.2 V 151.2 H 640.2 V 150.5 H 643.6 V 149.8 H 651.0 V 149.1 H 651.2 V 148.4 H 659.8 V 147.7 H 660.5 V 147.0 H 660.8 V 146.3 H 661.0 V 145.5 H 661.3 V 144.8 H 661.7 V 144.1 H 662.0 V 143.4 H 665.0 V 142.7 H 665.4 V 142.0 H 666.1 V 141.3 H 666.5 V 140.6 H 670.8 V 139.9 H 672.0 V 139.2 H 672.9 V 138.5 H 674.3 V 137.7 H 678.0 V 137.0 H 680.1 V 136.3 H 682.0 V 135.6 H 683.8 V 134.9 H 684.1 V 134.2 H 684.2 V 133.5 H 684.2 V 132.8 H 684.2 V 132.1 H 684.2 V 131.4 H 684.3 V 130.7 H 684.3 V 130.0 H 684.3 V 129.2 H 684.3 V 128.5 H 684.5 V 127.8 H 684.5 V 127.1 H 684.5 V 126.4 H 684.6 V 125.7 H 684.6 V 125.0 H 684.7 V 124.3 H 684.8 V 123.6 H 684.9 V 122.9 H 684.9 V 122.2 H 684.9 V 121.5 H 684.9 V 120.7 H 685.0 V 120.0 H 685.0 V 119.3 H 685.1 V 118.6 H 685.1 V 117.9 H 685.1 V 117.2 H 685.1 V 116.5 H 685.2 V 115.8 H 685.4 V 115.1 H 685.5 V 114.4 H 685.5 V 113.7 H 685.5 V 112.9 H 685.5 V 112.2 H 685.6 V 111.5 H 685.8 V 110.8 H 685.9 V 110.1 H 685.9 V 109.4 H 685.9 V 108.7 H 686.0 V 108.0 H 686.0 V 107.3 H 686.1 V 106.6 H 686.1 V 105.9 H 686.2 V 105.2 H 686.2 V 104.4 H 686.3 V 103.7 H 686.5 V 103.0 H 686.5 V 102.3 H 686.8 V 101.6 H 686.8 V 100.9 H 686.8 V 100.2 H 686.9 V 99.5 H 687.4 V 98.8 H 687.6 V 98.1 H 688.8 V 97.4 H 688.8 V 96.7 H 688.9 V 95.9 H 689.2 V 95.2 H 689.2 V 94.5 H 689.3 V 93.8 H 689.5 V 93.1 H 689.9 V 92.4 H 689.9 V 91.7 H 690.0 V 91.0 H 690.1 V 90.3 H 690.6 V 89.6 H 690.7 V 88.9 H 690.9 V 88.1 H 690.9 V 87.4 H 690.9 V 86.7 H 690.9 V 86.0 H 690.9 V 85.3 H 691.0 V 84.6 H 691.0 V 83.9 H 691.1 V 83.2 H 691.1 V 82.5 H 691.2 V 81.8 H 691.2 V 81.1 H 691.4 V 80.4 H 691.4 V 79.6 H 691.6 V 78.9 H 691.8 V 78.2 H 691.8 V 77.5 H 691.8 V 76.8 H 691.9 V 76.1 H 692.0 V 75.4 H 692.0 V 74.7 H 692.1 V 74.0 H 692.3 V 73.3 H 692.5 V 72.6 H 692.6 V 71.9 H 692.7 V 71.1 H 692.7 V 70.4 H 692.9 V 69.7 H 692.9 V 69.0 H 693.0 V 68.3 H 693.3 V 67.6 H 693.3 V 66.9 H 693.7 V 66.2 H 693.8 V 65.5 H 694.0 V 64.8 H 694.1 V 64.1 H 694.4 V 63.3 H 694.6 V 62.6 H 694.6 V 61.9 H 694.7 V 61.2 H 695.7 V 60.5 H 696.0 V 59.8 H 696.1 V 59.1 H 696.2 V 58.4 H 696.2 V 57.7 H 696.3 V 57.0 H 696.4 V 56.3 H 696.4 V 55.6 H 696.7 V 54.8 H 697.0 V 54.1 H 697.9 V 53.4 H 698.1 V 52.7 H 698.7 V 52.0 H 699.7 V 51.3 H 700.4 V 50.6 H 700.4 V 49.9 H 700.6 V 49.2 H 700.8 V 48.5 H 701.0 V 47.8 H 701.8 V 47.1 H 701.8 V 46.3 H 702.1 V 45.6 H 702.5 V 44.9 H 704.4 V 44.2 H 707.2 V 43.5 H 707.9 V 42.8 H 709.4 V 42.1 H 712.2 V 41.4 H 713.9 V 40.7 H 714.3 V 40.0 H 717.5 V 39.3 H 718.6 V 38.5 H 719.3 V 37.8 H 721.3 V 37.1 H 724.4 V 36.4 H 725.8 V 35.7 H 726.7 V 35.0 H 727.4 V 34.3 H 728.9 V 33.6 H 732.5 V 32.9 H 736.8 V 32.2 H 737.5 V 31.5 H 739.8 V 30.8 H 739.9 V 30.0 H 744.0 V 29.3 H 744.0" fill="none" stroke="#e2825f" stroke-width="2" stroke-linejoin="round"/>
-<path d="M 496.2 266.0 H 496.2 V 265.3 H 499.3 V 264.6 H 513.9 V 263.9 H 528.1 V 263.2 H 627.2 V 262.5 H 686.2 V 261.7 H 688.8 V 261.0 H 692.1 V 260.3 H 693.8 V 259.6 H 696.7 V 258.9 H 698.1 V 258.2 H 744.0" fill="none" stroke="#6aa9e0" stroke-width="2" stroke-linejoin="round"/>
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 <rect x="60" y="20" width="10" height="10" rx="2" fill="#e2825f"/>
 <text class="lgd" x="76" y="29" font-size="11.5">edge · 334</text>
-<rect x="60" y="36" width="10" height="10" rx="2" fill="#6aa9e0"/>
-<text class="lgd" x="76" y="45" font-size="11.5">protocol · 11</text>
-<rect x="60" y="52" width="10" height="10" rx="2" fill="#7bbf8f"/>
-<text class="lgd" x="76" y="61" font-size="11.5">analytics · 5</text>
 <text class="tick" x="744" y="21" font-size="10" text-anchor="end">to 2026-07-25</text>
 </svg>
diff --git a/tool/gen_star_history.py b/tool/gen_star_history.py
index 1ece18d..c38dc3e 100644
--- a/tool/gen_star_history.py
+++ b/tool/gen_star_history.py
@@ -25,7 +25,21 @@
 import sys
 from datetime import datetime, timezone
 
-REPOS = ["OpenStrap/edge", "OpenStrap/protocol", "OpenStrap/analytics"]
+# Which repos to plot. Defaults to edge alone, and that default is load-bearing:
+# a workflow's built-in GITHUB_TOKEN is scoped to its OWN repository, so reading
+# OpenStrap/protocol from a job running in OpenStrap/edge returns
+# 403 "Resource not accessible by integration". Charting siblings needs a PAT
+# with read access to them, so it's opt-in rather than a default that fails:
+#
+#   STAR_HISTORY_REPOS="OpenStrap/edge,OpenStrap/protocol" python3 tool/gen_star_history.py
+#
+# Keep whatever CI uses identical to what you run locally. If the repo set
+# differs between the two, the committed SVG flip-flops and the workflow commits
+# a revision every week — the churn the fail-closed/no-change guards exist to
+# prevent.
+REPOS = [r.strip() for r in
+         os.environ.get("STAR_HISTORY_REPOS", "OpenStrap/edge").split(",")
+         if r.strip()]
 OUT = "docs/star-history.svg"
 
 W, H = 760, 300