diff --git a/runbooks/README.md b/runbooks/README.md
index 5b2478e..8652240 100644
--- a/runbooks/README.md
+++ b/runbooks/README.md
@@ -7,6 +7,7 @@ derived from the merged PRs of the last ~12 months.
 | ---------------------------------- | -------------------------------------------------------------- | ---------------------- |
 | Add a foundational supporter       | [add-foundational-supporter.md](add-foundational-supporter.md) | #893, #879, #870       |
 | Add a corporate sponsor            | [add-corporate-sponsor.md](add-corporate-sponsor.md)           | #888, #866             |
+| Add a partner                      | [add-partner.md](add-partner.md)                               | #845                   |
 | Add a BPD Council member           | [add-council-member.md](add-council-member.md)                 | #853, #851, #849       |
 | Publish a blog post / announcement | [publish-blog-post.md](publish-blog-post.md)                   | #888, #864             |
 | Add or update a sponsored event    | [add-sponsored-event.md](add-sponsored-event.md)               | #863, #854             |
diff --git a/runbooks/add-partner.md b/runbooks/add-partner.md
new file mode 100644
index 0000000..701d58e
--- /dev/null
+++ b/runbooks/add-partner.md
@@ -0,0 +1,78 @@
+# Add a Partner
+
+Partners are organizations that offer discounts or benefits to the Black Python
+Devs community (course discounts, promo codes, etc.). They render in the
+Partnerships grid on the Support page from `_data/partnerships.json`.
+
+**Reference PRs:** #845 (partnerships fix); see also `_posts/2024-08-16-talkpython-training-partnership.md`
+
+## Inputs you need
+
+- Partner name
+- Logo file (prefer `.webp`; `.png` acceptable for legacy assets)
+- Landing page / offer URL
+- Promo code (if the partner provides one)
+- Offer description / blurb (the discount and the donation split, if any)
+
+## Data shape
+
+`_data/partnerships.json` is a flat list of objects. Each partner has:
+
+```json
+{
+  "name": "TalkPython Training",
+  "promo_code": "bpd-20pc-1c1da",
+  "description": "Use the <a href=\"https://...\">landing page</a> or promo code <strong>bpd-20pc-1c1da</strong> at checkout for a discount. A portion is donated to Black Python Devs.",
+  "url": "https://training.talkpython.fm/black-python-devs",
+  "logo": "/assets/images/talkpython.webp"
+}
+```
+
+- `description` may contain inline HTML — it is rendered unescaped in the grid.
+- `logo` is a site-root path; a leading `/` is preferred (e.g.
+  `/assets/images/<partner>.webp`).
+
+## Steps
+
+1. **Get the logo asset**
+
+   - Drop the raw logo in `tmp/` (git-ignored staging area).
+   - Optimize it into `assets/images/`:
+     ```
+     just optimize-image tmp/<partner>.png
+     ```
+     This rewrites it as a webp and removes the original. Move/rename the
+     result into `assets/images/<partner>.webp` if needed.
+   - Prefer a transparent background so it works with the site theme.
+
+2. **Add the partner to the JSON**
+
+   - Append a new object to the list in `_data/partnerships.json`.
+   - Fill in `name`, `promo_code`, `description`, `url`, and `logo`.
+   - If the partner has no promo code, set `"promo_code": ""`.
+   - Point `logo` at the asset from step 1 (e.g. `/assets/images/<partner>.webp`).
+
+3. **(Optional) Write an announcement post**
+
+   - If the partnership is being announced, create
+     `_posts/YYYY-MM-DD-<partner>-partnership.md`.
+   - Pattern the frontmatter and body after
+     `_posts/2024-08-16-talkpython-training-partnership.md`.
+
+4. **Run checks**
+
+   - `just test` — validates the JSON parses.
+   - `just serve` → confirm the logo and blurb render in the Partnerships
+     section of the Support page.
+
+5. **Open a PR** titled `Add <Partner> as a partner`. Reference any
+   intake/coordination issues that tracked the partnership.
+
+## Gotchas
+
+- `_data/partnerships.json` must stay valid JSON — a trailing comma or an
+  unescaped quote inside `description` will break the build. Escape inner
+  quotes as `\"`.
+- The grid caps logos at `max-height: 80px` with `object-fit: contain`, so
+  wide or tall logos are scaled to fit — no per-partner CSS is needed.
+- Large PNGs should be converted to `.webp` before committing.