feat: add retention feedback loop and honest support matrix (#2681)

* feat: add retention feedback loop

* test: retire obsolete README parity row guard

* fix: harden public feedback guidance

* fix: let feedback CLI output flush

* test: keep feedback help coverage focused

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: true
+contact_links:
+  - name: ECC questions and setup help
+    url: https://github.com/affaan-m/ECC/discussions/categories/q-a
+    about: Ask a public question or get help from the community.
+  - name: Private security report
+    url: https://github.com/affaan-m/ECC/security/advisories/new
+    about: Report vulnerabilities privately. Do not put secrets in a public issue.

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -0,0 +1,40 @@
+name: Feature idea
+description: Describe the outcome you need and your current workaround.
+title: "[Idea] "
+labels:
+  - enhancement
+  - needs-triage
+body:
+  - type: markdown
+    attributes:
+      value: |
+        This is a public GitHub issue. Do not include secrets, prompts, customer data, private repository details, or unredacted paths.
+  - type: textarea
+    id: outcome
+    attributes:
+      label: What outcome do you need?
+      description: Describe the job to be done, not an implementation if you do not have one in mind.
+    validations:
+      required: true
+  - type: textarea
+    id: workaround
+    attributes:
+      label: What do you do today?
+      description: Optional. A workaround helps us understand urgency and scope.
+  - type: dropdown
+    id: harness
+    attributes:
+      label: Which harness is affected?
+      options:
+        - All harnesses
+        - Claude Code
+        - Codex
+        - Cursor
+        - OpenCode
+        - GitHub Copilot
+        - Another harness
+  - type: textarea
+    id: success
+    attributes:
+      label: What would success look like?
+      description: Optional acceptance criteria or a small example.

.github/ISSUE_TEMPLATE/install-problem.yml

@@ -0,0 +1,93 @@
+name: Install or runtime problem
+description: Tell us what failed without writing a full diagnostic report.
+title: "[Problem] "
+labels:
+  - bug
+  - needs-triage
+  - area:install
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for reporting this. Keep it short: what happened and which setup you used are enough to start.
+
+        This issue is public. Do not paste secrets, prompts, private repository names, or unredacted home/project paths. ECC never uploads diagnostics automatically.
+  - type: dropdown
+    id: impact
+    attributes:
+      label: What is the impact?
+      options:
+        - ECC will not install
+        - ECC installs, but nothing loads
+        - Some components are missing or silently ignored
+        - ECC is duplicated or conflicts with another install
+        - A hook or command interrupts normal work
+        - Doctor or repair does not recover the install
+        - Other runtime problem
+    validations:
+      required: true
+  - type: textarea
+    id: happened
+    attributes:
+      label: What happened?
+      description: Include the shortest error or symptom that explains the problem.
+      placeholder: I expected …, but …
+    validations:
+      required: true
+  - type: dropdown
+    id: harness
+    attributes:
+      label: Harness
+      options:
+        - Claude Code
+        - Codex app or CLI
+        - Cursor
+        - OpenCode
+        - GitHub Copilot
+        - Kimi Code
+        - Gemini CLI
+        - Zed
+        - Antigravity
+        - Qwen
+        - Hermes
+        - OpenClaw
+        - CodeBuddy or JoyCode
+        - Other
+    validations:
+      required: true
+  - type: dropdown
+    id: install_method
+    attributes:
+      label: Install method
+      options:
+        - Claude plugin marketplace
+        - ecc or ecc-install CLI
+        - Manual clone or copy
+        - Codex sync script
+        - Codex marketplace plugin
+        - Harness-specific installer target
+        - Unknown
+        - Other
+  - type: dropdown
+    id: operating_system
+    attributes:
+      label: Operating system
+      options:
+        - Windows (native)
+        - Windows (WSL)
+        - macOS
+        - Linux
+        - Other
+    validations:
+      required: true
+  - type: input
+    id: versions
+    attributes:
+      label: ECC and harness versions
+      description: If known. A tag, commit, or package version is enough.
+      placeholder: ECC 2.1.0; Claude Code 2.x
+  - type: textarea
+    id: diagnostics
+    attributes:
+      label: Optional redacted diagnostics
+      description: Paste only the relevant lines from `ecc doctor`. Remove paths, repository names, prompts, tokens, and secrets.

.github/ISSUE_TEMPLATE/quick-feedback.yml

@@ -0,0 +1,56 @@
+name: Quick product feedback
+description: One required choice and an optional sentence. Leaving ECC is valid feedback.
+title: "[Feedback] "
+labels:
+  - feedback
+  - needs-triage
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for telling us what got in the way. This form is intentionally short.
+
+        This is a public GitHub issue. Do not include secrets, prompts, customer data, or private repository details.
+
+        Report a vulnerability through [GitHub's private security advisory form](https://github.com/affaan-m/ECC/security/advisories/new), not here. Non-vulnerability security or trust concerns are welcome in this form.
+  - type: dropdown
+    id: reason
+    attributes:
+      label: What best describes your feedback?
+      options:
+        - I could not install or activate ECC
+        - ECC made the agent slower or the output worse
+        - ECC used too much token or context budget
+        - Hooks or gates interrupted normal work
+        - ECC was too complicated or required too much configuration
+        - My harness or operating system was missing or unreliable
+        - I had a security or trust concern
+        - A feature I needed was missing
+        - Support was too slow
+        - I was only testing and no longer need it
+        - Something worked especially well
+        - Other
+    validations:
+      required: true
+  - type: dropdown
+    id: harness
+    attributes:
+      label: Where did you use ECC?
+      options:
+        - Claude Code
+        - Codex
+        - Cursor
+        - OpenCode
+        - GitHub Copilot
+        - Another harness
+        - I did not get far enough to use it
+  - type: textarea
+    id: change
+    attributes:
+      label: What is the one change that would matter most?
+      description: Optional. One sentence is plenty.
+  - type: textarea
+    id: keep
+    attributes:
+      label: What should ECC keep?
+      description: Optional. Tell us what was valuable even if the overall experience did not work.