Allow editing an open artifact and resharing it as a new link

AGENTS.md

@@ -47,7 +47,7 @@ Describe and preserve what is already true in the repo today.
 - The empty state explains the product and exposes sample fragment presets.
 - A built-in link creator can generate fragment-based links locally in the browser.
 - When a valid fragment is present, the app switches to a viewer-first artifact layout.
-- The artifact stage toolbar exposes copy-to-clipboard, file download, and (for markdown) browser print-to-PDF.
+- The artifact stage toolbar exposes copy-to-clipboard, file download, (for markdown) browser print-to-PDF, and an editor that regenerates a new fragment link from the currently open artifact.
 - `activeArtifactId` controls which artifact opens first.
 - Internal diff file navigation stays in UI state and does not repurpose the fragment.
 

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to `agent-render` will be documented in this file.
 
 The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project uses semantic versioning while it is published as tagged releases.
 
+## [Unreleased]
+
+### Added
+
+- In-viewer edit-and-reshare: open any artifact, correct its content, and generate a new fragment link without leaving the viewer.
+
 ## [0.1.0] - 2026-05-05
 
 ### Added

README.md

@@ -31,7 +31,7 @@ Built for the OpenClaw ecosystem, `agent-render` focuses on fragment-based shari
 - Markdown, code, diff, CSV, and JSON all render in the static shell
 - Fragment transport supports `plain`, `lz`, `deflate`, `arx`, `arx2`, `arx3`, and `arx4`, with automatic shortest-fragment selection across available wire formats
 - The `arx` substitution dictionary is served at `/arx-dictionary.json` with a pre-compressed `/arx-dictionary.json.br` variant; the `arx2` tuple-envelope overlay is served at `/arx2-dictionary.json` with a pre-compressed `/arx2-dictionary.json.br` variant; `arx3` reuses those proven bytes and optimizes for compact visible Unicode fragments; `arx4` adds the curated context-mixer priors at `/arx4-priors.json` with a pre-compressed `/arx4-priors.json.br` variant
-- The viewer toolbar copies artifact bodies to the clipboard, downloads them as files, and (for markdown) supports browser print-to-PDF
+- The viewer toolbar copies artifact bodies to the clipboard, downloads them as files, (for markdown) supports browser print-to-PDF, and can edit the open artifact then reshare it as a new fragment link
 - Deployment target: static hosting, including Cloudflare Pages
 
 ## Included Renderers

docs/architecture.md

@@ -29,7 +29,7 @@ The static export also emits `sitemap.xml` at the site root (and under `NEXT_PUB
 
 The viewer shell now routes all five artifact kinds through dynamically imported client-only renderers so the landing shell stays light and static-host friendly.
 
-When a valid fragment is present, the shell switches into a viewer-first layout with bundle navigation beside the active artifact. The active artifact header includes copy, download, and markdown print actions. The landing/samples experience is only the empty state.
+When a valid fragment is present, the shell switches into a viewer-first layout with bundle navigation beside the active artifact. The active artifact header includes copy, download, markdown print, and edit-and-reshare actions. Edit regenerates a new fragment link from the current artifact (or the current artifact inside a bundle) without writing anything to a server. The landing/samples experience is only the empty state.
 
 Diff file navigation is intentionally internal UI state now. The URL fragment remains reserved for payload transport and active-artifact selection instead of being reused as an in-page file anchor system.
 

docs/testing.md

@@ -43,7 +43,7 @@ Playwright visual tests live in `tests/e2e/visual.spec.ts`.
 
 The suite is intentionally split by responsibility:
 
-- browser tests protect exported-app behavior, fragment-driven rendering, downloads, clipboard copy, print flow, themes, and layout hierarchy (including mobile toolbar and default code-wrap checks in `tests/e2e/viewer.spec.ts`)
+- browser tests protect exported-app behavior, fragment-driven rendering, downloads, clipboard copy, print flow, in-viewer edit-and-reshare, themes, and layout hierarchy (including mobile toolbar and default code-wrap checks in `tests/e2e/viewer.spec.ts`)
 - visual tests protect empty state, artifact views, theme presentation, and compact-content spacing
 - component tests protect selector/disclosure UI contracts
 - unit tests protect transport codecs, envelope validation, diff parsing, and language inference

skills/selfhosted-agent-render/SKILL.md

@@ -109,7 +109,7 @@ Returns `200 { "status": "ok" }` when the server is up and the database is reach
 
 ## Viewer links
 
-When a user visits `/{uuid}`, the server looks up the stored payload, injects it into the viewer page, and renders the same UI as the fragment-based product. All viewer features work: copy, download, print-to-PDF, diff modes, artifact switching, raw toggle.
+When a user visits `/{uuid}`, the server looks up the stored payload, injects it into the viewer page, and renders the same UI as the fragment-based product. All viewer features work: copy, download, print-to-PDF, edit-and-reshare, diff modes, artifact switching, raw toggle. Edit-and-reshare emits a new static fragment link rather than updating the stored UUID payload, and generation fails if the edited artifact exceeds the fragment budget.
 
 Construct viewer links as:
 

src/app/globals.css

@@ -928,6 +928,18 @@ select {
   padding: 0.95rem;
 }
 
+.artifact-editor {
+  display: grid;
+  gap: 1.15rem;
+  padding: 1.5rem;
+}
+
+@media (min-width: 768px) {
+  .artifact-editor {
+    padding: 2rem 2.5rem;
+  }
+}
+
 .viewer-toolbar {
   display: flex;
   flex-wrap: wrap;

src/components/viewer-shell.tsx

@@ -303,13 +303,16 @@ export function ViewerShell() {
   useEffect(() => {
     rendererReadyKeyRef.current = rendererReadyKey;
 
-    if (!activeArtifact) {
+    if (!rendererReadyKey) {
       setRendererReady(true);
       return;
     }
 
+    // Reset only when the hash/artifact-id key changes. A later decode that only
+    // replaces artifact contents (same id, new fragment) must not clear a ready
+    // signal the remounted renderer already reported for that key.
     setRendererReady(false);
-  }, [activeArtifact, rendererReadyKey]);
+  }, [rendererReadyKey]);
 
   const markRendererReady = useCallback((readyKey: string) => {
     if (rendererReadyKeyRef.current === readyKey) {
@@ -415,6 +418,7 @@ export function ViewerShell() {
             fragmentLength={fragmentLength}
             hash={hash}
             onArtifactSelect={handleArtifactSelect}
+            onPreviewHash={setFragmentHash}
             onRendererReady={markRendererReady}
             rendererReadyKey={rendererReadyKey}
             statusTone={statusTone}