diff --git a/.github/scripts/partisan-pin b/.github/scripts/partisan-pin
index 6585d01..628b29c 100644
--- a/.github/scripts/partisan-pin
+++ b/.github/scripts/partisan-pin
@@ -5,4 +5,10 @@
 #
 # Recon context lives in the auto-memory entry
 # `project_partisan_pin.md` and in issue #57 / #49.
-58b56da84ed815063e39acf6616bcc01bc6809a5
+#
+# Bumped 2026-07-23 (devel HEAD) to pick up partisan PR #349
+# ("Add a physical_path attribute to Replica", merged 2026-07-15),
+# whose test_replicas asserts physical_path is populated whenever
+# client_version() >= 6.1.0 — the assertion this repo's #101 /
+# #100 work needs exercised in CI.
+1356610d2a195e881ca55351db68f61e53c4edc4
diff --git a/Cargo.toml b/Cargo.toml
index c77b04b..d80d5e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ name        = "baton-rs"
 version     = "1.0.0-alpha.1"
 edition     = "2021"
 license     = "GPL-2.0"
-description = "Rust reimplementation of baton, the iRODS metadata client. Wire-compatible with upstream baton 6.0.0."
+description = "Rust reimplementation of baton, the iRODS metadata client. Wire-compatible with upstream baton 6.1.0."
 repository  = "https://github.com/jmtcsngr/baton-rs"
 readme      = "README.md"
 
diff --git a/README.md b/README.md
index 4d69417..491ae18 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 A Rust reimplementation of [baton](https://github.com/wtsi-npg/baton), the iRODS
 client focused on metadata operations via a single JSON interface. Targets
-wire-compat with upstream baton **6.0.0**.
+wire-compat with upstream baton **6.1.0**.
 
 **Status:** Under active development. The seven binaries are implemented and
 exercised against iRODS 4.2.7 / 4.3.4 / 4.3.5 in CI, plus integration runs
@@ -57,7 +57,7 @@ without coordinating schema changes with baton-rs. See the
 
 ## Compatibility with upstream baton
 
-baton-rs is wire-compatible with upstream baton 6.0.0 for the success
+baton-rs is wire-compatible with upstream baton 6.1.0 for the success
 path and the in-band error path. Known divergences:
 
 - **Parse-error wire shape** — baton-rs emits a stand-alone synthetic
@@ -111,7 +111,7 @@ environment variable:
 | Env var state                          | `--version` reports                                        |
 |----------------------------------------|------------------------------------------------------------|
 | Unset (or empty string)                | The baton-rs crate version (`Cargo.toml`'s `version`).     |
-| Set to any non-empty value             | `BATON_COMPAT_VERSION` (e.g. `6.0.0`) — the upstream baton release baton-rs targets wire-compat with. |
+| Set to any non-empty value             | `BATON_COMPAT_VERSION` (e.g. `6.1.0`) — the upstream baton release baton-rs targets wire-compat with. |
 
 Honest reporting is the default so logs and debugging surfaces aren't misled
 about what's actually running. The compat mode exists for downstream consumers
@@ -125,7 +125,7 @@ $ baton-do --version
 1.0.0-alpha.1
 
 $ STRICT_BATON_COMPAT=1 baton-do --version
-6.0.0
+6.1.0
 ```
 
 The `STRICT_BATON_COMPAT` toggle is also reserved for future wire-format
diff --git a/SESSIONS.md b/SESSIONS.md
index 107b8f1..2e32f8d 100644
--- a/SESSIONS.md
+++ b/SESSIONS.md
@@ -10,7 +10,7 @@ Paste the relevant sections at the start of each new session to restore context
 
 These values do not change during normal development. If they do change, note the reason here.
 
-- **Target baton version for parity:** `6.0.0`
+- **Target baton version for parity:** `6.1.0` _(bumped from `6.0.0` 2026-07-23 — upstream released 6.0.1 and 6.1.0; see Changelog for this file, below, for what the re-pin required.)_
 - **Reference schema:** <https://wtsi-npg.github.io/baton/>
 - **Primary compatibility oracle:** partisan's Python test suite, run with baton-rs's `baton-do` on `PATH`
 - **Supported iRODS versions (CI matrix):** 4.2.7, 4.3.4, 4.3.5 _(add 5.0.1 when ready)_
@@ -583,3 +583,8 @@ Use this space to record non-trivial changes to the plan itself — e.g. changin
   - **#82** — extendo pin bumped to `v3.1.0` (`b24b63c…`, against `feat/extendo-ci` base). Tagged release over devel HEAD.
   - **#83** — synthetic-`-1` audit cleanup across 17 validation paths. Group A (target-type) and B (local-FS) surface `-310000` (USER_FILE_DOES_NOT_EXIST); Group C (argument validation) surfaces `-403000` (USER_INPUT_OPTION_ERR). Adds `-403000` to `error::descriptive_phrase`.
   - **#85** — client-side `verify_checksum` mismatch aligned to `-407000` (CHECK_VERIFICATION_RESULTS). Final audit follow-up; client-side and server-side mismatch now surface under the same code.
+- `2026-07-23` — Target baton version for parity bumped `6.0.0` → `6.1.0` on branch `chore/bump-baton-compat-6.1.0` (PR #102), landed as a compat *feature*, not a version-string-only chore. Upstream had shipped two releases we hadn't tracked: `6.0.1` (2026-05-19, mostly CI/dependency churn plus two OOB-write hardening fixes in its own genQuery builder, wtsi-npg/baton#337/#338 — see the #100 note below for why that turned out not to be baton-rs's problem) and `6.1.0` (2026-07-02, adds a `physical_path` field to replicate JSON objects, wtsi-npg/baton#339). Two gaps were filed against the re-pin; only one was real:
+  - **#100 — filed, then retracted as a false premise.** Initial analysis assumed `genQueryInp_t.sqlCondInp` / `.selectInp` were fixed-size iRODS arrays that `addInxVal` / `addInxIval` could write past, mirroring upstream baton's 6.0.1 OOB-write fix (wtsi-npg/baton#337/#338). A bounds check (`len >= MAX_NUM_CONDITIONS`) was added to the shim — which failed CI immediately: `MAX_NUM_CONDITIONS` isn't an iRODS macro at all. Checking the actual iRODS source (`irods/irods`) showed `inxIvalPair_t` / `inxValPair_t` (`lib/core/include/irods/objInfo.h`) are pointer-based, and `addInxIval` / `addInxVal` (`lib/core/src/rcMisc.cpp`) dynamically grow their backing storage via `malloc` — there is no fixed capacity to overflow. `MAX_NUM_CONDITIONS = 32` is baton's *own* self-imposed limit (`baton/src/query.h`), guarding a fixed-size buffer in baton's own C code, not the shared iRODS client library. Since baton-rs's shim calls `addInxIval` / `addInxVal` directly with no intermediate fixed-size staging array, it never had the vulnerability baton patched. All #100 code (the bounds check, `GenQuery::add_select`'s `Result` return, the 25 call-site `?` additions, and the new test) was reverted; the issue was corrected on GitHub rather than silently dropped, and the finding recorded in memory (`feedback_compat_version_claims.md`'s sibling note) as a reminder to verify upstream C internals before porting a "security fix" description across languages/architectures.
+  - **#101** — added `SHIM_COL_DATA_PATH` (→ `COL_D_DATA_PATH`) through the standard shim declare/implement/mirror path, a new `Replicate.physical_path: String` field, and wired it into `fetch_replicates`. Extended the existing `--replicate` integration test and the `Replicate` JSON round-trip unit test.
+  - **Caught mid-flight:** an initial pass bumped `BATON_COMPAT_VERSION` (and the Cargo.toml/README "wire-compatible with X" claims) to 6.1.0 *before* implementing either gap — the user caught this as a compat lie (`STRICT_BATON_COMPAT=1 baton-do --version` is read by real callers, not just documentation) before it merged. Recorded as a standing rule in memory (`feedback_compat_version_claims.md`): never bump the operational compat-version claim ahead of implementing that version's schema/behaviour changes.
+  - **Partisan pin bumped** (`.github/scripts/partisan-pin`, `58b56da` → `1356610d2a`, devel HEAD) to pick up partisan PR #349 ("Add a physical_path attribute to Replica", merged 2026-07-15), whose `test_replicas` asserts `physical_path is not None` whenever `client_version() >= 6.1.0` — the exact assertion this work needed exercised in CI. Extendo's pin was checked and left alone: no physical_path work exists there yet (`v3.1.0..v3.2.0` diff is dependency bumps only).
diff --git a/shim/ffi_shim.c b/shim/ffi_shim.c
index 55c1ced..bbd9486 100644
--- a/shim/ffi_shim.c
+++ b/shim/ffi_shim.c
@@ -226,6 +226,7 @@ static int translate_col(shim_col_t col) {
     case SHIM_COL_COLL_USER_ZONE:        return COL_COLL_USER_ZONE;
     case SHIM_COL_COLL_ACCESS_NAME:      return COL_COLL_ACCESS_NAME;
     case SHIM_COL_DATA_SIZE:             return COL_DATA_SIZE;
+    case SHIM_COL_DATA_PATH:             return COL_D_DATA_PATH;
     }
     return -1;
 }
diff --git a/shim/ffi_shim.h b/shim/ffi_shim.h
index 43a4d31..79aca95 100644
--- a/shim/ffi_shim.h
+++ b/shim/ffi_shim.h
@@ -173,6 +173,7 @@ typedef enum {
     SHIM_COL_COLL_USER_ZONE        = 23,
     SHIM_COL_COLL_ACCESS_NAME      = 24,
     SHIM_COL_DATA_SIZE             = 25,
+    SHIM_COL_DATA_PATH             = 26,
 } shim_col_t;
 
 // Allocate a fresh query builder. Returns NULL on out-of-memory.
diff --git a/src/ffi.rs b/src/ffi.rs
index bc0a5ac..036613b 100644
--- a/src/ffi.rs
+++ b/src/ffi.rs
@@ -107,6 +107,7 @@ pub const SHIM_COL_COLL_USER_NAME: shim_col_t = 22;
 pub const SHIM_COL_COLL_USER_ZONE: shim_col_t = 23;
 pub const SHIM_COL_COLL_ACCESS_NAME: shim_col_t = 24;
 pub const SHIM_COL_DATA_SIZE: shim_col_t = 25;
+pub const SHIM_COL_DATA_PATH: shim_col_t = 26;
 
 // ---- Data object read/write -------------------------------------------------
 
diff --git a/src/operations/list.rs b/src/operations/list.rs
index 1f33ea2..ff7bbb6 100644
--- a/src/operations/list.rs
+++ b/src/operations/list.rs
@@ -466,6 +466,7 @@ fn fetch_replicates(
     q.add_select(ffi::SHIM_COL_R_LOC);
     q.add_select(ffi::SHIM_COL_D_RESC_NAME);
     q.add_select(ffi::SHIM_COL_D_REPL_STATUS);
+    q.add_select(ffi::SHIM_COL_DATA_PATH);
 
     q.add_where(
         ffi::SHIM_COL_COLL_NAME,
@@ -485,6 +486,7 @@ fn fetch_replicates(
             let location = row.get(2).cloned().unwrap_or_default();
             let resource = row.get(3).cloned().unwrap_or_default();
             let status = row.get(4).cloned().unwrap_or_default();
+            let physical_path = row.get(5).cloned().unwrap_or_default();
 
             let number: u32 = number_str.parse().map_err(|_| BatonError {
                 code: -1,
@@ -497,6 +499,7 @@ fn fetch_replicates(
                 resource,
                 number,
                 valid: status == "1",
+                physical_path,
             })
         })
         .collect()
diff --git a/src/types.rs b/src/types.rs
index 297445a..ed268f2 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -1,11 +1,11 @@
 // Generated by:     Claude Opus 4.7 (1M context)
 // Generation date:  2026-04-24
-// Last modified by: Claude Opus 4.7 (1M context)
-// Last modified:    2026-05-12
+// Last modified by: Claude Sonnet 5 (1M context)
+// Last modified:    2026-07-23
 
 //! JSON data types for the baton-rs API.
 //!
-//! All types round-trip against the baton 6.0.0 JSON schema
+//! All types round-trip against the baton 6.1.0 JSON schema
 //! (<https://wtsi-npg.github.io/baton/>).
 
 use serde::de::{self, MapAccess, Visitor};
@@ -106,6 +106,13 @@ pub struct Replicate {
     pub resource: String,
     pub number: u32,
     pub valid: bool,
+
+    /// The replica's physical path on the resource server's
+    /// filesystem, sourced from `COL_D_DATA_PATH`. Added in baton
+    /// 6.1.0 (wtsi-npg/baton#339); baton-rs always populates it, so
+    /// unlike upstream pre-6.1.0 servers there's no "missing key"
+    /// case to model here.
+    pub physical_path: String,
 }
 
 /// A timestamp for a data object or replicate.
@@ -1391,13 +1398,14 @@ mod tests {
 
     #[test]
     fn replicate_round_trip() {
-        let json = r#"{"checksum":"d41d8cd98f00b204e9800998ecf8427e","location":"host","resource":"demoResc","number":0,"valid":true}"#;
+        let json = r#"{"checksum":"d41d8cd98f00b204e9800998ecf8427e","location":"host","resource":"demoResc","number":0,"valid":true,"physical_path":"/var/lib/irods/Vault/home/irods/foo.txt"}"#;
         let r: Replicate = serde_json::from_str(json).unwrap();
         assert_eq!(r.checksum, "d41d8cd98f00b204e9800998ecf8427e");
         assert_eq!(r.location, "host");
         assert_eq!(r.resource, "demoResc");
         assert_eq!(r.number, 0);
         assert!(r.valid);
+        assert_eq!(r.physical_path, "/var/lib/irods/Vault/home/irods/foo.txt");
         assert_eq!(serde_json::to_string(&r).unwrap(), json);
     }
 
diff --git a/src/version.rs b/src/version.rs
index 66c3c11..7d9f6a1 100644
--- a/src/version.rs
+++ b/src/version.rs
@@ -35,7 +35,7 @@
 /// recorded in `SESSIONS.md` whenever we re-pin against a newer
 /// upstream baton. The release checklist in #58 calls out this
 /// audit step explicitly.
-pub const BATON_COMPAT_VERSION: &str = "6.0.0";
+pub const BATON_COMPAT_VERSION: &str = "6.1.0";
 
 /// Env var that toggles compat-mode version reporting. See module
 /// doc-comment for the rationale and #58 for the design.
diff --git a/tests/baton_do_binary.rs b/tests/baton_do_binary.rs
index a83e7cc..9b65a3e 100644
--- a/tests/baton_do_binary.rs
+++ b/tests/baton_do_binary.rs
@@ -1225,7 +1225,7 @@ fn version_flag_unset_reports_crate_version() {
 #[test]
 fn version_flag_with_strict_compat_reports_compat_version() {
     // STRICT_BATON_COMPAT=1 → report BATON_COMPAT_VERSION instead
-    // (currently 6.0.0). Lets partisan's `client_version()` parse
+    // (currently 6.1.0). Lets partisan's `client_version()` parse
     // the result and compare it against expected baton X.Y.Z values.
     let mut child = Command::new(baton_do_path())
         .args(["--version"])
diff --git a/tests/list.rs b/tests/list.rs
index 0cd87b2..2d584ae 100644
--- a/tests/list.rs
+++ b/tests/list.rs
@@ -628,6 +628,13 @@ fn list_data_object_with_replicate() {
         .expect("replica 0 present");
     assert!(!r0.resource.is_empty(), "resource set");
     assert!(!r0.location.is_empty(), "location set");
+    // physical_path (baton 6.1.0, #101 / COL_D_DATA_PATH) is a real
+    // filesystem path under the test container's iRODS vault.
+    assert!(
+        r0.physical_path.starts_with("/var/lib/irods"),
+        "expected physical_path under the iRODS vault, got {:?}",
+        r0.physical_path
+    );
 
     // Every replica must be valid right after iput. This is stricter
     // than the original "r0 is valid" form: on the 4.2.7 CI image