diff --git a/planning/releases/0.15.2.md b/planning/releases/0.15.2.md
new file mode 100644
index 0000000..88010ff
--- /dev/null
+++ b/planning/releases/0.15.2.md
@@ -0,0 +1,59 @@
+# httpware 0.15.2 — docs accuracy + internal dedup, no behavior change
+
+No public API changes. Every commit since 0.15.1 is docs, internal refactoring,
+CI, or planning tooling — safe to upgrade unconditionally.
+
+## Docs
+
+- **Site overhaul + audit fixes** (#90): the "Why httpware" pitch is now
+  benefit-first (`raise_for_status()` dropped from the lead); `index.md`
+  slimmed to a true quickstart; the OpenTelemetry wiring guide moved to a new
+  `docs/observability.md`; `resilience.md` trimmed. Fixed two
+  security-relevant doc bugs where `errors.md`/`middleware.md` said secrets in
+  URLs are *not* redacted when the code does redact them, plus several other
+  doc/code mismatches (Retry-After-over-`max_delay` behavior,
+  previously-undocumented `ResponseTooLargeError`/`max_response_body_bytes`).
+- **Project lockup hero** added to the docs home page (#91).
+- **Docs-and-comments audit**: fixed stale docstrings (`BulkheadFullError`,
+  `AsyncClient.stream()`'s version caveat), a cross-doc contradiction on where
+  `DecodeError` wrapping happens, a `httpx`/`httpx2` terminology slip (with a
+  follow-up correction to the underlying `respx`-compatibility claim, verified
+  against `respx`'s own docs), a `contributing.md` wording contradiction on
+  docstring requirements, and deduplicated `ResponseTooLargeError`'s
+  triple-repeated behavior description down to one canonical account
+  (#103, #104, #105).
+
+## Internal (no behavior change)
+
+Continuation of the sync/async deduplication pass flagged by the 2026-06-14
+deep audit — every remaining "duplicated, no divergence yet" item from that
+audit is now closed:
+
+- Body-cap subsystem and httpx2-exception-mapper context managers extracted
+  out of `client.py` into dedicated `_internal/` modules.
+- Client construction-validation and kwargs-assembly logic shared between
+  `Client`/`AsyncClient`.
+- The 6 hand-duplicated exception reconstruct/`__reduce__` pairs in
+  `errors.py` collapsed into one `_KeywordReduceMixin`.
+- `Bulkhead`/`AsyncBulkhead` constructor validation and rejection-event
+  construction shared.
+- The decoders' memoizing get-or-build cache pattern (4 sites across
+  `pydantic.py`/`msgspec.py`) shared via one generic helper.
+- `_read_capped`/`_read_capped_async`'s declared-length-reject and
+  `Response`-reconstruction blocks shared.
+- `AsyncBulkhead`/`AsyncCircuitBreaker`'s identical single-event-loop guard
+  shared via a new `_event_loop_guard.py`.
+
+## CI & tooling
+
+- PRs now run `mkdocs --strict` as a check, catching broken internal
+  links/anchors and orphaned pages before merge (#92).
+- Planning convention bumped to 2.0.0 (flat change files, no per-change
+  folders) (#93, #94).
+- Dropped stale `ty: ignore` suppressions in circuit-breaker tests that a
+  newer `ty` no longer needs (#96).
+
+## Downstream
+
+No action required. Nothing about the installed package's public behavior
+changes.