diff --git a/CHANGELOG.md b/CHANGELOG.md
index d17419927..2e27a4be7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -71,6 +71,7 @@ All notable changes to OriginWeave are documented in this file. The format follo
 - Revocation is reported as not configured; the product makes no OCSP or CRL validation claim without supplied revocation evidence.
 - Every generic network header and query value is redacted before evidence leaves the trusted boundary, including conventionally benign field names containing attacker-controlled bytes.
 - Evidence capture enforces count and byte bounds and rejects credential-bearing source URLs, query strings, fragments, controls, whitespace, malformed percent escapes, encoded separators, dot segments, and backslash paths.
+- Network-evidence paths and provenance source URL paths accept only RFC 3986 literal `pchar` syntax plus validated percent-encoded octets and slash separators, preventing raw general delimiters such as `[` and `]` or other invalid URI-presentation bytes from entering either evidence surface.
 - Hard RAM and VRAM pressure pauses the active agent and rejects new admission; hard VRAM pressure also offloads a resident local model.
 - The hourly product agent has no Git metadata or repository authority. A separate post-verification publisher opens one PR and cannot approve or merge it.
 - The unprivileged OpenCode user is restricted to loopback egress during model execution, preventing runner-wide allow-listed endpoints from becoming direct source-exfiltration channels.
diff --git a/crates/originweave-evidence/src/lib.rs b/crates/originweave-evidence/src/lib.rs
index ad183e9eb..b38578044 100644
--- a/crates/originweave-evidence/src/lib.rs
+++ b/crates/originweave-evidence/src/lib.rs
@@ -224,6 +224,9 @@ fn validate_path(path: &str) -> Result<(), EvidenceError> {
             index += 3;
             continue;
         }
+        if !is_rfc3986_pchar(byte) {
+            return Err(EvidenceError::InvalidPath);
+        }
         segment.push(byte);
         index += 1;
     }
@@ -233,6 +236,32 @@ fn validate_path(path: &str) -> Result<(), EvidenceError> {
     Ok(())
 }
 
+const fn is_rfc3986_pchar(byte: u8) -> bool {
+    matches!(
+        byte,
+        b'A'..=b'Z'
+            | b'a'..=b'z'
+            | b'0'..=b'9'
+            | b'-'
+            | b'.'
+            | b'_'
+            | b'~'
+            | b'!'
+            | b'$'
+            | b'&'
+            | b'\''
+            | b'('
+            | b')'
+            | b'*'
+            | b'+'
+            | b','
+            | b';'
+            | b'='
+            | b':'
+            | b'@'
+    )
+}
+
 const fn hexadecimal_value(byte: u8) -> Option<u8> {
     match byte {
         b'0'..=b'9' => Some(byte - b'0'),
diff --git a/crates/originweave-evidence/tests/evidence.rs b/crates/originweave-evidence/tests/evidence.rs
index 2912180f1..48d49cbc4 100644
--- a/crates/originweave-evidence/tests/evidence.rs
+++ b/crates/originweave-evidence/tests/evidence.rs
@@ -80,6 +80,9 @@ fn network_evidence_rejects_non_path_inputs() {
         "/bad\npath",
         "/bad path",
         "/windows\\path",
+        "/[segment]",
+        "/raw|pipe",
+        "/raw-한글",
     ] {
         assert_eq!(
             NetworkEvidence::capture(
@@ -128,6 +131,7 @@ fn provenance_rejects_credential_bearing_or_ambiguous_source_urls() {
         "https://example.com/bad\\path",
         "https://example.com/\n",
         "https://example.com/a/%2f/b",
+        "https://example.com/[segment]",
     ] {
         assert_eq!(
             ProvenanceRecord::new(
diff --git a/docs/doctoring.md b/docs/doctoring.md
index f0133bb5d..419cc2a00 100644
--- a/docs/doctoring.md
+++ b/docs/doctoring.md
@@ -82,6 +82,8 @@ RFC 9309 standardizes robots parsing, matching, error handling, and caching. It
 
 W3C PROV-O supplies interoperable Entity, Activity, Agent, derivation, attribution, and responsibility concepts. ISO 28500:2017, confirmed in 2023, defines WARC storage for protocol payloads, control information, metadata, transformations, duplicate detection, integrity, and segmentation. OriginWeave uses source hashes and locators in the safety kernel, then adds WARC and PROV adapters as separately testable modules.
 
+RFC 3986 remains Internet Standard STD 66 for generic URI syntax. RFC 8820 is the current URI design-and-ownership Best Current Practice; it obsoletes RFC 7320 and updates RFC 3986 without replacing RFC 3986's path grammar. Section 3.3 of RFC 3986 defines each path segment as `*pchar`, where literal path characters are unreserved characters, sub-delimiters, `:`, or `@`; `/` separates segments and other reserved characters such as `[` and `]` are not literal `pchar`. OriginWeave's shared evidence-path validator therefore applies that literal ASCII `pchar` set plus validated percent-encoded octets and explicit slash separators to both `NetworkEvidence::capture` paths and provenance source-URL paths. Existing stricter evidence-safety rules continue to reject encoded separators, dot-segment ambiguity, controls, whitespace, query strings, fragments, backslashes, and credential-bearing authority. This fail-closed syntax tightening affects both evidence surfaces; it does not authorize the source origin, destination, network access, capture, disclosure, or retention.
+
 ### AI risk and prompt injection
 
 NIST AI 600-1 provides generative-AI lifecycle risk guidance. WASP demonstrates that web-navigation agents can follow low-effort indirect prompt injections. OriginWeave therefore separates trusted instructions, untrusted observations, and protected secrets at type and process boundaries rather than rely on prompting alone.
@@ -106,6 +108,8 @@ Autio, C., Schwartz, R., Dunietz, J., Jain, S., Stanley, M., Tabassi, E., Hall,
 
 Barth, A. (2011). *The web origin concept* (RFC 6454). Internet Engineering Task Force. https://doi.org/10.17487/RFC6454
 
+Berners-Lee, T., Fielding, R., & Masinter, L. (2005). *Uniform resource identifier (URI): Generic syntax* (RFC 3986; STD 66). Internet Engineering Task Force. https://doi.org/10.17487/RFC3986
+
 Bonica, R., Cotton, M., Haberman, B., & Vegoda, L. (2017). *Updates to the special-purpose IP address registries* (RFC 8190). Internet Engineering Task Force. https://doi.org/10.17487/RFC8190
 
 Chromium Authors. (n.d.). *Proxy support in Chrome* [Source documentation]. Chromium. https://chromium.googlesource.com/chromium/src/+/a3e71ebfa307d8760eb68b777e2998a869940092/net/docs/proxy.md
@@ -144,6 +148,10 @@ Microsoft. (2025, July 25). *Azure IP address 168.63.129.16 overview*. Microsoft
 
 Nielsen, S., Cetin, E., Schwendeman, P., Sun, Q., Xu, J., & Tang, Y. (2025). *Learning to orchestrate agents in natural language with the Conductor* [Preprint]. arXiv. https://doi.org/10.48550/arXiv.2512.04388
 
+Nottingham, M. (2014). *URI design and ownership* (RFC 7320). Internet Engineering Task Force. https://doi.org/10.17487/RFC7320
+
+Nottingham, M. (2020). *URI design and ownership* (RFC 8820; BCP 190). Internet Engineering Task Force. https://doi.org/10.17487/RFC8820
+
 Rescorla, E. (2026). *The Transport Layer Security (TLS) protocol version 1.3* (RFC 9846). Internet Engineering Task Force. https://doi.org/10.17487/RFC9846
 
 Rustls Project Developers. (2026). *rustls 0.23.42* [Computer software]. https://docs.rs/rustls/0.23.42/rustls/
@@ -170,4 +178,4 @@ World Wide Web Consortium. (2026, June 1). *WebDriver BiDi* (W3C Working Draft).
 
 Xu, J., Sun, Q., Schwendeman, P., Nielsen, S., Cetin, E., & Tang, Y. (2025). *TRINITY: An evolved LLM coordinator* [Preprint]. arXiv. https://doi.org/10.48550/arXiv.2512.04695
 
-Zhou, S., Xu, F. F., Zhu, H., Zhou, X., Lo, R., Sridhar, A., Cheng, X., Ou, T., Bisk, Y., Fried, D., Alon, U., & Neubig, G. (2023). *WebArena: A realistic web environment for building autonomous agents*. arXiv. https://doi.org/10.48550/arXiv.2307.13854
+Zhou, S., Xu, F. F., Zhu, H., Zhou, X., Lo, R., Sridhar, A., Cheng, X., Ou, T., Bisk, Y., Fried, D., Alon, U., & Neubig, G. (2023). *WebArena: A realistic web environment for building autonomous agents*. arXiv. https://doi.org/10.48550/arXiv.2307.13854
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