diff --git a/.config/opencode/.cursorrules b/.config/opencode/.cursorrules
new file mode 100644
index 0000000..8950fe7
--- /dev/null
+++ b/.config/opencode/.cursorrules
@@ -0,0 +1,52 @@
+# OpenCode Agent Configuration
+
+This repository contains the multi-agent configuration for OpenCode, defining agent roles, permissions, quality pipelines, and project memory conventions.
+
+## Project Structure
+
+```
+opencode.jsonc              # Main config: default agent, plugins, permissions, MCP servers
+agents/                     # Agent definitions (one .md per agent)
+  lead.md                   # Primary orchestrator
+  coder.md                  # Implementation agent
+  reviewer.md               # Code review (read-only code, writes .memory/*)
+  tester.md                 # Test validation (writes .memory/*)
+  explorer.md               # Codebase mapping (read-only code, writes .memory/*)
+  researcher.md             # Technical investigation (writes .memory/*)
+  librarian.md              # Documentation specialist (full edit)
+  critic.md                 # Plan review gate (writes .memory/*)
+  sme.md                    # Domain expert (writes .memory/*)
+  designer.md               # UI/UX guidance (writes .memory/*)
+.memory/                    # Persistent project memory (knowledge, decisions, plans, research)
+AGENTS.md                   # OpenCode instruction file
+CLAUDE.md                   # Claude Code instruction file
+.github/copilot-instructions.md  # GitHub Copilot instruction file
+.cursorrules                # This file (Cursor instruction file)
+```
+
+## Agent Permission Model
+
+- **Full edit access:** `lead`, `coder`, `librarian`.
+- **Memory-only edit access:** `reviewer`, `tester`, `explorer`, `researcher`, `critic`, `sme`, `designer` — `permission.edit: allow` in config, but instructions restrict edits to `.memory/*` only. Code/source edits remain read-only.
+- OpenCode does not support path-scoped `permission.edit`, so guardrails are instruction-level.
+
+## Memory System
+
+`.memory/` is the persistent project knowledge store:
+- `knowledge.md` — architecture, patterns, key concepts
+- `decisions.md` — architecture decisions, design choices
+- `plans/<feature>.md` — active plans with tasks and statuses
+- `research/<topic>.md` — research findings
+
+Workflow: read relevant `.memory/` files → work → update `.memory/` files with outcomes.
+
+## Quality Pipeline
+
+Standard flow: `explorer/researcher → coder → reviewer → tester → librarian`.
+Three tiers based on change scope (Tier 1: full, Tier 2: standard, Tier 3: fast).
+
+## Conventions
+
+- Cross-tool instruction files (`AGENTS.md`, `CLAUDE.md`, `.github/copilot-instructions.md`, `.cursorrules`) must stay synchronized.
+- `.memory/knowledge.md` is the canonical source of truth; instruction files are derived views.
+- Recording discipline: record only outcomes/decisions/discoveries in `.memory/`, never ceremony checkpoints.
diff --git a/.config/opencode/.github/copilot-instructions.md b/.config/opencode/.github/copilot-instructions.md
new file mode 100644
index 0000000..944cc73
--- /dev/null
+++ b/.config/opencode/.github/copilot-instructions.md
@@ -0,0 +1,52 @@
+# OpenCode Agent Configuration
+
+This repository contains the multi-agent configuration for OpenCode, defining agent roles, permissions, quality pipelines, and project memory conventions.
+
+## Project Structure
+
+```
+opencode.jsonc              # Main config: default agent, plugins, permissions, MCP servers
+agents/                     # Agent definitions (one .md per agent)
+  lead.md                   # Primary orchestrator
+  coder.md                  # Implementation agent
+  reviewer.md               # Code review (read-only code, writes .memory/*)
+  tester.md                 # Test validation (writes .memory/*)
+  explorer.md               # Codebase mapping (read-only code, writes .memory/*)
+  researcher.md             # Technical investigation (writes .memory/*)
+  librarian.md              # Documentation specialist (full edit)
+  critic.md                 # Plan review gate (writes .memory/*)
+  sme.md                    # Domain expert (writes .memory/*)
+  designer.md               # UI/UX guidance (writes .memory/*)
+.memory/                    # Persistent project memory (knowledge, decisions, plans, research)
+AGENTS.md                   # OpenCode instruction file
+CLAUDE.md                   # Claude Code instruction file
+.github/copilot-instructions.md  # This file (GitHub Copilot instruction file)
+.cursorrules                # Cursor instruction file
+```
+
+## Agent Permission Model
+
+- **Full edit access:** `lead`, `coder`, `librarian`.
+- **Memory-only edit access:** `reviewer`, `tester`, `explorer`, `researcher`, `critic`, `sme`, `designer` — `permission.edit: allow` in config, but instructions restrict edits to `.memory/*` only. Code/source edits remain read-only.
+- OpenCode does not support path-scoped `permission.edit`, so guardrails are instruction-level.
+
+## Memory System
+
+`.memory/` is the persistent project knowledge store:
+- `knowledge.md` — architecture, patterns, key concepts
+- `decisions.md` — architecture decisions, design choices
+- `plans/<feature>.md` — active plans with tasks and statuses
+- `research/<topic>.md` — research findings
+
+Workflow: read relevant `.memory/` files → work → update `.memory/` files with outcomes.
+
+## Quality Pipeline
+
+Standard flow: `explorer/researcher → coder → reviewer → tester → librarian`.
+Three tiers based on change scope (Tier 1: full, Tier 2: standard, Tier 3: fast).
+
+## Conventions
+
+- Cross-tool instruction files (`AGENTS.md`, `CLAUDE.md`, `.github/copilot-instructions.md`, `.cursorrules`) must stay synchronized.
+- `.memory/knowledge.md` is the canonical source of truth; instruction files are derived views.
+- Recording discipline: record only outcomes/decisions/discoveries in `.memory/`, never ceremony checkpoints.
diff --git a/.config/opencode/.memory/decisions.md b/.config/opencode/.memory/decisions.md
new file mode 100644
index 0000000..a7bf530
--- /dev/null
+++ b/.config/opencode/.memory/decisions.md
@@ -0,0 +1,16 @@
+## Agent Memory Write Access
+
+**Decision:** Enable `permission.edit: allow` for all seven agents with memory recording duties (reviewer, tester, explorer, researcher, critic, sme, designer) so they can write `.memory/*` files directly.
+
+**Rationale:** These agents have explicit memory duties (recording verdicts, discoveries, research findings, guidance, design decisions) but previously had `permission.edit: deny`, making those duties impossible. The lead had to relay all memory writes, losing fidelity and adding overhead.
+
+**Implementation:**
+- Changed `permission.edit: deny` → `permission.edit: allow` in all seven agent files.
+- Added instruction-level guardrails in each agent to restrict edits to `.memory/*` only (code/source remains read-only).
+- Path-scoped `permission.edit` is not supported by OpenCode, so instruction-level guardrails are the enforcement mechanism.
+
+**Affected files:** `agents/reviewer.md`, `agents/tester.md`, `agents/explorer.md`, `agents/researcher.md`, `agents/critic.md`, `agents/sme.md`, `agents/designer.md`.
+
+**Risk:** Agents could theoretically edit non-memory files since the config-level permission is `allow`. Mitigation is instruction-level enforcement, which is effective but not mechanical.
+
+See [Plan: Agent Memory Write Access](plans/agent-memory-write-access.md) | See [Knowledge: Permission Model](knowledge.md#permission-model)
diff --git a/.config/opencode/.memory/knowledge.md b/.config/opencode/.memory/knowledge.md
new file mode 100644
index 0000000..ad26a48
--- /dev/null
+++ b/.config/opencode/.memory/knowledge.md
@@ -0,0 +1,39 @@
+## Project Overview
+
+This is the OpenCode agentic configuration for a multi-agent coding workflow. It defines agent roles, permissions, quality pipelines, and project memory conventions used across all projects that load this config.
+
+- **Config root:** `~/.config/opencode/`
+- **Config file:** `opencode.jsonc` — defines default agent, plugins, global permissions, and MCP servers.
+- **Agent definitions:** `agents/*.md` — one file per agent with YAML frontmatter (model, permissions, temperature) and markdown instructions.
+- **Memory system:** `.memory/` — persistent project knowledge, decisions, plans, and research in markdown.
+- **Cross-tool instruction files:** `AGENTS.md`, `CLAUDE.md`, `.github/copilot-instructions.md`, `.cursorrules` — derived views of project knowledge for different agentic tools.
+
+## Agent Architecture
+
+10 agents with distinct roles, models, and permission profiles. See [Agent Roster in AGENTS.md](../AGENTS.md#agent-roster) for the full table.
+
+### Permission Model
+
+- **Full edit access:** `lead`, `coder`, `librarian`.
+- **Memory-only edit access:** `reviewer`, `tester`, `explorer`, `researcher`, `critic`, `sme`, `designer` — these agents have `permission.edit: allow` but are instructed to keep code/source edits read-only. Their edit permission exists solely to support `.memory/*` writes for recording duties (verdicts, discoveries, research, guidance, design decisions).
+- **No edit access:** none (all agents can write `.memory/*`).
+
+See [Decision: Agent Memory Write Access](decisions.md#agent-memory-write-access) for rationale and guardrails.
+
+### Memory Write Guardrails
+
+Agents with memory-only edit access are constrained by instruction-level guardrails (not path-scoped config, which OpenCode does not support):
+
+1. Each agent's instructions explicitly state: "`.memory/*` writes are allowed for [specific duty]; code/source edits remain read-only."
+2. Each agent's instructions list tool restrictions (e.g., "Disallowed: non-memory file edits").
+3. The `permission.edit: allow` fallback is necessary because OpenCode's `permission.edit` does not support path-scoped allow/deny syntax.
+
+## Quality Pipeline
+
+Tiered pipeline (Tier 1/2/3) defined in `agents/lead.md`. Standard flow: `explorer/researcher → coder → reviewer → tester → librarian`.
+
+## MCP Servers
+
+- **Context7:** Remote documentation lookup (`https://mcp.context7.com/mcp`)
+- **GitHub Grep:** Remote code search across public repos (`https://mcp.grep.app`)
+- **Playwright:** Local headless Chromium for UI testing
diff --git a/.config/opencode/.memory/plans/agent-memory-write-access.md b/.config/opencode/.memory/plans/agent-memory-write-access.md
new file mode 100644
index 0000000..f648292
--- /dev/null
+++ b/.config/opencode/.memory/plans/agent-memory-write-access.md
@@ -0,0 +1,46 @@
+# Plan: enable agent memory write access
+
+## Goal
+Allow non-lead agents (starting with reviewer) to write updates into `.memory/` so findings and decisions are not lost between delegations.
+
+## Tasks
+- [x] Discover where agent capabilities/tool permissions are defined and which agents currently cannot write memory.
+  - **Acceptance criteria:** exact config file(s), current restrictions, and required change identified. ✅
+  - **Assigned agent:** explorer
+  - **Findings:**
+    - Root cause: `permission.edit: deny` in `agents/reviewer.md`, `agents/explorer.md`, `agents/tester.md`, `agents/critic.md`, `agents/designer.md`, `agents/researcher.md`, and `agents/sme.md`.
+    - Conflict: these agents also have memory duties requiring writes to `.memory/*`, making duties impossible under current permissions.
+    - `agents/librarian.md`, `agents/coder.md`, and `agents/lead.md` do not deny edit and are unaffected.
+    - `opencode.jsonc` does not define a global edit permission override.
+    - Additional consistency update needed: `AGENTS.md` reviewer row should clarify "read-only" refers to code-review behavior, while `.memory/*` writes are allowed.
+  - **Dependencies:** none
+  - **Workstream:** `main`
+  - **Coder dispatch scope:** N/A (discovery)
+
+- [x] Implement configuration/instruction updates so all intended agents can write `.memory/*`.
+  - **Acceptance criteria:** config/instructions updated; reviewer specifically can write memory; no conflicting rule remains.
+  - **Assigned agent:** coder
+  - **Dependencies:** discovery output
+  - **Workstream:** `main`
+  - **Coder dispatch scope:** single feature — “memory write capability for agents”
+  - **Implementation note:** Used fallback `edit: allow` for the seven affected agents because repo-local configs provide no confirmed path-scoped `permission.edit` syntax. Guardrails were tightened in each affected prompt to explicitly keep code/source edits read-only and allow writes only for `.memory/*` duties.
+
+- [x] Quality gate the change (correctness review + static validation).
+  - **Acceptance criteria:** reviewer approves and static validation confirms permissions and instructions are coherent. ✅
+  - **Assigned agent:** reviewer + tester
+  - **Outcome:** reviewer `APPROVED` (score 0), tester `PASS`; only low-severity wording suggestions (description-level “read-only” phrasing in reviewer/explorer) with no functional contradiction.
+  - **Dependencies:** implementation complete
+  - **Workstream:** `main`
+  - **Coder dispatch scope:** N/A
+
+- [x] Documentation coverage and memory updates.
+  - **Acceptance criteria:** relevant instructions/docs updated and `.memory/knowledge.md` captures the new policy. ✅
+  - **Assigned agent:** librarian
+  - **Dependencies:** quality gate complete
+  - **Workstream:** `main`
+  - **Coder dispatch scope:** N/A
+  - **Outcome:** Created `.memory/knowledge.md` with permission model and guardrails documentation. Created `.memory/decisions.md` with decision record cross-referencing this plan. Updated `AGENTS.md` roster to describe memory-write duties for all seven agents. Created three missing cross-tool instruction files (`CLAUDE.md`, `.github/copilot-instructions.md`, `.cursorrules`) with synchronized project knowledge including the agent permission model.
+
+## Critic gate
+- Verdict: `APPROVED`
+- Caveat: validate whether `permission.edit` supports path-scoped allow/deny syntax. If unsupported, use fallback `edit: allow` and keep behavior guardrails in agent instructions.
diff --git a/.config/opencode/AGENTS.md b/.config/opencode/AGENTS.md
index da7c50c..d832512 100644
--- a/.config/opencode/AGENTS.md
+++ b/.config/opencode/AGENTS.md
@@ -65,14 +65,16 @@ Be specific in summaries: include parameter names, defaults, file locations, and
 |---|---|---|
 | `lead` | Primary orchestrator that decomposes work, delegates, and synthesizes outcomes. | `github-copilot/claude-opus-4` (global default) |
 | `coder` | Implementation-focused coding agent for reliable code changes. | `github-copilot/gpt-5.3-codex` |
-| `reviewer` | Read-only quality gate for correctness and security review. | `github-copilot/claude-opus-4.6` |
-| `tester` | Validation agent for standard + adversarial testing and Playwright UI checks. | `github-copilot/claude-sonnet-4.6` |
-| `explorer` | Fast read-only codebase mapper for impact surface and dependencies. | `github-copilot/claude-sonnet-4.6` |
-| `researcher` | Deep technical investigator across code, docs, and external references. | `github-copilot/claude-opus-4.6` |
+| `reviewer` | Read-only code/source review; writes `.memory/*` for verdict records. | `github-copilot/claude-opus-4.6` |
+| `tester` | Validation agent for standard + adversarial testing; writes `.memory/*` for test outcomes. | `github-copilot/claude-sonnet-4.6` |
+| `explorer` | Fast read-only codebase mapper; writes `.memory/*` for discovery records. | `github-copilot/claude-sonnet-4.6` |
+| `researcher` | Deep technical investigator; writes `.memory/*` for research findings. | `github-copilot/claude-opus-4.6` |
 | `librarian` | Documentation coverage and accuracy specialist. | `github-copilot/claude-opus-4.6` |
-| `critic` | Pre-implementation gate and blocker sounding board. | `github-copilot/claude-opus-4.6` |
-| `sme` | Subject-matter expert for domain-specific consultation. | `github-copilot/claude-opus-4.6` |
-| `designer` | UI/UX specialist for interaction and visual guidance. | `github-copilot/claude-sonnet-4.6` |
+| `critic` | Pre-implementation gate and blocker sounding board; writes `.memory/*` for verdicts. | `github-copilot/claude-opus-4.6` |
+| `sme` | Subject-matter expert for domain-specific consultation; writes `.memory/*` for guidance cache. | `github-copilot/claude-opus-4.6` |
+| `designer` | UI/UX specialist for interaction and visual guidance; writes `.memory/*` for design decisions. | `github-copilot/claude-sonnet-4.6` |
+
+All agents except `lead`, `coder`, and `librarian` are code/source read-only but have `permission.edit: allow` scoped to `.memory/*` writes for their recording duties. The `lead` and `librarian` have full edit access; `coder` has full edit access for implementation.
 
 ## Parallelization
 
diff --git a/.config/opencode/CLAUDE.md b/.config/opencode/CLAUDE.md
new file mode 100644
index 0000000..6b458d4
--- /dev/null
+++ b/.config/opencode/CLAUDE.md
@@ -0,0 +1,52 @@
+# OpenCode Agent Configuration
+
+This repository contains the multi-agent configuration for OpenCode, defining agent roles, permissions, quality pipelines, and project memory conventions.
+
+## Project Structure
+
+```
+opencode.jsonc              # Main config: default agent, plugins, permissions, MCP servers
+agents/                     # Agent definitions (one .md per agent)
+  lead.md                   # Primary orchestrator
+  coder.md                  # Implementation agent
+  reviewer.md               # Code review (read-only code, writes .memory/*)
+  tester.md                 # Test validation (writes .memory/*)
+  explorer.md               # Codebase mapping (read-only code, writes .memory/*)
+  researcher.md             # Technical investigation (writes .memory/*)
+  librarian.md              # Documentation specialist (full edit)
+  critic.md                 # Plan review gate (writes .memory/*)
+  sme.md                    # Domain expert (writes .memory/*)
+  designer.md               # UI/UX guidance (writes .memory/*)
+.memory/                    # Persistent project memory (knowledge, decisions, plans, research)
+AGENTS.md                   # OpenCode instruction file
+CLAUDE.md                   # This file (Claude Code instruction file)
+.github/copilot-instructions.md  # GitHub Copilot instruction file
+.cursorrules                # Cursor instruction file
+```
+
+## Agent Permission Model
+
+- **Full edit access:** `lead`, `coder`, `librarian`.
+- **Memory-only edit access:** `reviewer`, `tester`, `explorer`, `researcher`, `critic`, `sme`, `designer` — `permission.edit: allow` in config, but instructions restrict edits to `.memory/*` only. Code/source edits remain read-only.
+- OpenCode does not support path-scoped `permission.edit`, so guardrails are instruction-level.
+
+## Memory System
+
+`.memory/` is the persistent project knowledge store:
+- `knowledge.md` — architecture, patterns, key concepts
+- `decisions.md` — architecture decisions, design choices
+- `plans/<feature>.md` — active plans with tasks and statuses
+- `research/<topic>.md` — research findings
+
+Workflow: read relevant `.memory/` files → work → update `.memory/` files with outcomes.
+
+## Quality Pipeline
+
+Standard flow: `explorer/researcher → coder → reviewer → tester → librarian`.
+Three tiers based on change scope (Tier 1: full, Tier 2: standard, Tier 3: fast).
+
+## Conventions
+
+- Cross-tool instruction files (`AGENTS.md`, `CLAUDE.md`, `.github/copilot-instructions.md`, `.cursorrules`) must stay synchronized.
+- `.memory/knowledge.md` is the canonical source of truth; instruction files are derived views.
+- Recording discipline: record only outcomes/decisions/discoveries in `.memory/`, never ceremony checkpoints.
diff --git a/.config/opencode/agents/critic.md b/.config/opencode/agents/critic.md
index 79197d6..e45898d 100644
--- a/.config/opencode/agents/critic.md
+++ b/.config/opencode/agents/critic.md
@@ -4,7 +4,7 @@ mode: subagent
 model: github-copilot/claude-opus-4.6
 temperature: 0.2
 permission:
-  edit: deny
+  edit: allow
   bash: deny
   webfetch: deny
   websearch: deny
@@ -22,7 +22,7 @@ Purpose:
 Tool restrictions:
 
 - Allowed: `read`, `glob`, and `grep`.
-- Disallowed: file edits, shell commands, and web tools.
+- Disallowed: non-memory file edits, shell commands, and web tools.
 
 Roles:
 
@@ -81,4 +81,5 @@ Memory file duty:
 - After issuing a CRITIC-GATE verdict, record it in `.memory/decisions.md` as a markdown section.
 - Summary must include the verdict and concise rationale.
 - Add file references when specific files were evaluated, and cross-reference the active plan file when applicable.
+- `.memory/*` writes required for this duty are explicitly allowed; code/source edits remain read-only.
 - Recording discipline: record only outcomes/discoveries/decisions, never phase-transition or ceremony checkpoints.
diff --git a/.config/opencode/agents/designer.md b/.config/opencode/agents/designer.md
index 40b5af5..30a482d 100644
--- a/.config/opencode/agents/designer.md
+++ b/.config/opencode/agents/designer.md
@@ -4,7 +4,7 @@ mode: subagent
 model: github-copilot/claude-sonnet-4.6
 temperature: 0.4
 permission:
-  edit: deny
+  edit: allow
   bash: deny
   websearch: deny
   webfetch: deny
@@ -21,7 +21,7 @@ Purpose:
 Tool restrictions:
 
 - Allowed: `read`, `glob`, and `grep`.
-- Disallowed: file edits, shell commands, and web tools.
+- Disallowed: non-memory file edits, shell commands, and web tools.
 
 When invoked:
 
@@ -55,4 +55,5 @@ Memory file duty:
 
 - After significant design decisions, record them in `.memory/decisions.md` as markdown sections.
 - Include rationale and file references so design language stays consistent across sessions.
+- `.memory/*` writes required for this duty are explicitly allowed; code/source edits remain read-only.
 - Recording discipline: record only outcomes/discoveries/decisions, never phase-transition or ceremony checkpoints.
diff --git a/.config/opencode/agents/explorer.md b/.config/opencode/agents/explorer.md
index 2445c5f..e15cba4 100644
--- a/.config/opencode/agents/explorer.md
+++ b/.config/opencode/agents/explorer.md
@@ -4,7 +4,7 @@ mode: subagent
 model: github-copilot/claude-sonnet-4.6
 temperature: 0.1
 permission:
-  edit: deny
+  edit: allow
   bash: deny
   webfetch: deny
   websearch: deny
@@ -23,10 +23,11 @@ Operating rules:
 1. Read relevant `.memory/*.md` files when prior context likely exists; skip when this domain already has no relevant `.memory/` entries this session.
 2. Use read-only tools to gather architecture context.
 3. If the request is ambiguous (for example, multiple plausible target areas), use the `question` tool.
-4. Do not write files or execute shell commands.
+4. Do not write non-memory files or execute shell commands.
 5. Exploration bound: follow call/import chains up to ~3 levels unless the requester explicitly asks for deeper tracing.
 6. If significant architectural discoveries are made, record outcomes in the relevant `.memory/` files and link related sections with markdown cross-references.
 7. Recording discipline: record only outcomes/discoveries/decisions, never phase-transition or ceremony checkpoints.
+8. `.memory/*` writes are allowed for recording duties; code/source edits remain read-only.
 
 Required output contract (required):
 
diff --git a/.config/opencode/agents/researcher.md b/.config/opencode/agents/researcher.md
index 35cc974..d854f3f 100644
--- a/.config/opencode/agents/researcher.md
+++ b/.config/opencode/agents/researcher.md
@@ -4,7 +4,7 @@ mode: subagent
 model: github-copilot/claude-opus-4.6
 temperature: 0.2
 permission:
-  edit: deny
+  edit: allow
   bash: deny
 ---
 
@@ -20,12 +20,13 @@ Operating rules:
 1. Read relevant `.memory/*.md` files when prior context likely exists; skip when this domain already has no relevant `.memory/` entries this session.
 2. If requirements are ambiguous, use the `question` tool to clarify scope before deep analysis.
 3. After meaningful research, record durable insights in the relevant `.memory/` files with rationale, file refs, and markdown cross-references.
-4. Do not modify files or run shell commands.
+4. Do not modify non-memory files or run shell commands.
 5. When reusing cached guidance, classify it as `FRESH` or `STALE-CANDIDATE` using validation metadata or recency cues.
 6. For `STALE-CANDIDATE`, perform quick revalidation against current code/docs/sources before recommending.
 7. Include a compact freshness note per key recommendation in output.
 8. Use the lead.md freshness metadata schema for notes/updates: `confidence`, `last_validated`, `volatility`, `review_after_days`, `validation_count`, `contradiction_count`.
 9. Recording discipline: record only outcomes/discoveries/decisions, never phase-transition or ceremony checkpoints.
+10. `.memory/*` writes are allowed for research recording duties; code/source edits remain read-only.
 
 Output style:
 
diff --git a/.config/opencode/agents/reviewer.md b/.config/opencode/agents/reviewer.md
index dae44aa..052e19b 100644
--- a/.config/opencode/agents/reviewer.md
+++ b/.config/opencode/agents/reviewer.md
@@ -4,7 +4,7 @@ mode: subagent
 model: github-copilot/claude-opus-4.6
 temperature: 0.3
 permission:
-  edit: deny
+  edit: allow
   bash: deny
   webfetch: deny
   websearch: deny
@@ -27,7 +27,7 @@ Pipeline position:
 Operating rules:
 
 1. Read relevant `.memory/*.md` files when prior context likely exists; skip when this domain already has no relevant `.memory/` entries this session.
-2. Use read-only analysis; do not edit files or run shell commands.
+2. Use read-only analysis for code/source files; do not edit non-memory files or run shell commands.
 3. If review criteria are unclear, use the `question` tool.
 4. Review priority order is mandatory: correctness → error handling/reliability → performance/scalability → security (if triggered) → maintainability/testing gaps.
 5. Do not front-load style-only comments before functional risks.
@@ -149,4 +149,5 @@ Memory file duty:
 
 - After issuing a verdict, record it in `.memory/decisions.md` as a markdown section.
 - Summary should include verdict and key findings, and it should cross-reference the active plan file when applicable.
+- `.memory/*` writes required for this duty are explicitly allowed; code/source edits remain read-only.
 - Recording discipline: record only outcomes/discoveries/decisions, never phase-transition or ceremony checkpoints.
diff --git a/.config/opencode/agents/sme.md b/.config/opencode/agents/sme.md
index be6cbaa..5660068 100644
--- a/.config/opencode/agents/sme.md
+++ b/.config/opencode/agents/sme.md
@@ -4,7 +4,7 @@ mode: subagent
 model: github-copilot/claude-opus-4.6
 temperature: 0.3
 permission:
-  edit: deny
+  edit: allow
   bash: deny
 ---
 
@@ -18,7 +18,7 @@ Purpose:
 Tool restrictions:
 
 - Allowed: `read`, `glob`, `grep`, `webfetch`, `websearch`, and `codesearch`.
-- Disallowed: file edits and shell commands.
+- Disallowed: non-memory file edits and shell commands.
 
 Guidance caching rule (critical):
 
@@ -32,6 +32,7 @@ Guidance caching rule (critical):
 6. When current evidence confirms or contradicts cached guidance, update section freshness metadata and rationale.
 7. Use the lead.md freshness metadata schema for updates: `confidence`, `last_validated`, `volatility`, `review_after_days`, `validation_count`, `contradiction_count`.
 8. Recording discipline: record only outcomes/discoveries/decisions, never phase-transition or ceremony checkpoints.
+9. `.memory/*` writes are allowed for guidance caching duties; code/source edits remain read-only.
 
 Workflow:
 
diff --git a/.config/opencode/agents/tester.md b/.config/opencode/agents/tester.md
index dfa682e..a0b04e9 100644
--- a/.config/opencode/agents/tester.md
+++ b/.config/opencode/agents/tester.md
@@ -4,7 +4,7 @@ mode: subagent
 model: github-copilot/claude-sonnet-4.6
 temperature: 0.1
 permission:
-  edit: deny
+  edit: allow
   bash:
     "uv run pytest*": allow
     "uv run python -m pytest*": allow
@@ -46,7 +46,7 @@ Operating rules:
 2. Run only test-related commands.
 3. Prefer `uv run pytest` patterns when testing Python projects.
 4. If test scope is ambiguous, use the `question` tool.
-5. Do not modify files.
+5. Do not modify non-memory files.
 6. **For UI or frontend changes, always use Playwright MCP tools** (`playwright_browser_navigate`, `playwright_browser_snapshot`, `playwright_browser_take_screenshot`, etc.) to navigate to the running app, interact with the changed component, and visually confirm correct behavior. A code-only review is not sufficient for UI changes.
 7. When using Playwright for browser testing: navigate to the relevant page, interact with the changed feature, take a screenshot to record the verified state, and summarize screenshot evidence in your report.
 8. **Clean up test artifacts.** After testing, delete any generated files (screenshots, temp files, logs). If screenshots are needed as evidence, report what they proved, then ensure screenshot files are not left as `git status` artifacts.
@@ -108,6 +108,7 @@ Memory file duty:
 
 - After completing both passes (or recording a blocking failure), record the outcome in `.memory/decisions.md` as a markdown section.
 - Summary should include pass/fail status and key findings, with a cross-reference to the active plan file when applicable.
+- `.memory/*` writes required for this duty are explicitly allowed; code/source edits remain read-only.
 - Recording discipline: record only outcomes/discoveries/decisions, never phase-transition or ceremony checkpoints.
 
 Infrastructure unavailability: