vayupress

README

VayuPress

Adaptive publishing infrastructure for the sovereign web. SQLite-first, zero-trust, zero telemetry. Policy-governed runtime with adaptive system modes, sandboxed plugins, transactional event outbox, durable audit trail, and fault-tolerant federated publishing.

Complete digital sovereignty in one binary. Own your content. Own your communication. Own your infrastructure. Publishing is the core identity, VayuMail the native sovereignty layer, VayuPGP the native privacy layer, and VayuOS the native control layer — all in a single Go binary, single process, single config.

What's New in v1.9.1

Full notes in CHANGELOG.md

Deeper analytics and a more complete mailbox — all still in one binary, privacy-first.

• VayuAnalytics — reporting periods up to 3 years. Pick any window from 24h to 3 years; it flows through every card, goals/journey, and exports.
• VayuAnalytics — conversion goals. Track a page view or custom event as a goal and see completions and conversion rate.
• VayuAnalytics — visitor journey. Most common page-to-page paths with (entry)/(exit) markers.
• VayuAnalytics — export. Download any report as CSV or JSON (computed locally, no PII).
• VayuAnalytics — country/region/city. Read server-side from your reverse proxy (e.g. Cloudflare CF-IPCountry/CF-IPCity, X-Geo-*). VayuPress does no GeoIP lookup, bundles no GeoIP database, and never stores an IP — geo shows only when your proxy supplies it.
• VayuAnalytics — live panel. Active visitors and pages, refreshed every 10s.
• VayuMail — junk filter, account password/disable, reply & forward. A fully-local spam heuristic files junk on inbound; set or disable mailbox passwords from the panel; reply/forward pre-filled from the original message.

What's New in v1.9.0

Full notes in CHANGELOG.md · architecture decisions in docs/adr/ (ADR-0076–0080) · roadmap in docs/ROADMAP-v1.9.md

"Stable Private Email" — the inbound half of VayuMail. v1.9.0 completes the receive side so VayuPress is a mailbox you can actually receive and read mail in, still inside one binary.

• SMTP-receive server — a pure-Go RFC 5321 listener (EHLO/MAIL/RCPT/DATA/ RSET/NOOP/QUIT) that accepts mail only for your local domain (no open relay), undoes dot-stuffing, and enforces size caps, delivering into Maildir.
• IMAP read server — a pure-Go RFC 3501 subset (CAPABILITY, LOGIN via your VayuPress account, LIST, SELECT, FETCH incl. BODY[]/FLAGS/SIZE/INTERNALDATE, STORE \Seen, LOGOUT) so standard clients (Thunderbird, mobile) read the Maildir.
• Transparent PGP decryption on read — when VayuPGP holds the account's key, IMAP serves the decrypted message body; best-effort, and it never blocks delivery.
• Inbox panel — /os/vayuos/mail/inbox shows per-account message/unseen counts.
• Opt-in by design — the inbound listeners start only with VAYUOS_MAIL_INBOUND=on (Operational Simplicity Doctrine); when off, no mail port is opened and the binary boots unchanged.

Scope: inbound SPF/DKIM/DMARC verification, greylisting, and IMAPS/TLS hardening are tracked as the next milestones in docs/ROADMAP-v1.9.md.

What's New in v1.8.0

Full notes in CHANGELOG.md · upgrade steps in docs/UPGRADING.md

Sovereignty release — VayuAnalytics, VayuOS Phase 2 (VayuMail + VayuPGP), and the Theme Studio Gallery.

• VayuAnalytics — privacy-first, cookieless, no-PII web analytics. Pageviews, sessions, top pages, referrers, UTM campaigns, custom events, funnels, retention cohorts and revenue — stored locally in SQLite. Visitor identity is a server-side daily-rotating salted hash: no cookies, no localStorage, no IP or User-Agent ever stored, no consent banner required, nothing to leak on a database compromise. The public ingest endpoint is body-capped and per-IP rate-limited; a retention sweeper enforces data minimisation.
• VayuPGP — native end-to-end PGP privacy layer (built on ProtonMail go-crypto). Ed25519 + Curve25519 keypairs auto-generated on account creation, private keys AES-256-GCM encrypted at rest under a key derived from the master secret (never logged, never leave the server), full encrypt/decrypt/sign/verify, key rotation that preserves old messages, and a Web Key Directory (WKD) served at /.well-known/openpgpkey/ so any GPG client can discover your keys.
• VayuMail — native outbound mail sovereignty layer. RFC 6376 DKIM signing (relaxed/relaxed, RSA-SHA256), direct-to-MX delivery with opportunistic STARTTLS (no third-party relay), a durable SQLite retry queue, Maildir storage, automatic MX / SPF / DKIM / DMARC record generation with live DNS health checks, and automatic PGP encryption of outgoing mail when a recipient key is discoverable. Mail never leaves your server unencrypted to a third party.
• VayuOS control layer — a typed event bus (account creation auto-provisions a PGP keypair + mailbox), an ordered boot orchestrator with graceful degradation, and a health monitor, all surfaced in the /os/vayuos console (keys, mail queue, DNS health, security updates).
• Security-update watcher — an opt-in (privacy-default-off) advisory that tracks upstream security releases of the crypto dependencies powering VayuPGP and VayuMail, surfacing available patches in the panel. It transmits nothing about your site.
• Theme Studio Gallery — expanded preset gallery (20+ themes incl. the new Gale editorial and Zephyr bright-creative layouts) with a CSP-safe Pico bridge so presets restyle the public site instantly, plus WCAG-AA contrast and ≥44px touch targets.

Scope note: VayuMail v1.8.0 delivers the outbound sovereignty path (submission, DKIM, queue, DNS, WKD, PGP). A full inbound MX + IMAP server is a governed future milestone under the Operational Simplicity Doctrine.

Previously in v1.7.0

Full notes in CHANGELOG.md · upgrade steps in docs/UPGRADING.md

VayuOS — unified operator powerhouse, draft/publish workflow, and member signup.

• Draft/publish workflow — articles are published or draft. The VayuOS post manager (/os/posts) lists every post with a live status pill and one-click Publish / Unpublish that purges render caches immediately.
• All operator tools inside VayuOS — System Modes, Policy Engine, Runtime Topology, Replay Explorer, Fault Manager, and ADR Registry now render inside the VayuOS chrome. Old /admin/* operator URLs 301-redirect.
• Member signup page (/signup) — branded reader-facing page wired to the magic-link auth flow.
• Ghost-style homepage auth buttons — optional Sign in / Sign up buttons in the public nav, toggled per-site from VayuOS → Members settings.
• Three draft-content security fixes — API, render cache, and comment API all now treat drafts as non-existent to anonymous callers (see Security below).

Security (v1.7.0)

ID	Severity	Surface	Fix
LEAK-1	Critical	GET /api/v1/articles/{slug}	Returns 404 for drafts to unauthenticated callers
LEAK-2	High	On-disk render cache	Worker verifies DB status before caching draft HTML
LEAK-3	Low	Comment API	Rejects requests whose slug resolves to a draft

Upgrading from v1.6.0

Run migrations — migration 030 adds the status column to articles. All existing rows default to published; nothing is hidden after upgrade. The VayuOS shell at /os is unchanged; old operator-page URLs 301-redirect.

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What's New in v1.6.0

Full notes in CHANGELOG.md · upgrade steps in docs/UPGRADING.md

One admin, for real — Admin v2 removed (ADR-0069 Stage 3). VayuOS at /os is now the only admin, and the block editor owns every authoring flow.

• Native create path — brand-new posts open the /os block editor and are created on first Save through the authoritative article service (no more delegating to the v2 editor).
• Native legacy-post editing — opening an existing legacy (non-block) post loads it in the block editor, pre-seeded with an in-memory import of its HTML; the import is not persisted and the published content is untouched until Save.
• Admin v2 deleted — admin_ui.go, the v2 login handlers, admin-v2.css, admin-v2.js and the v2 e2e specs are gone, along with the ADMIN_LEGACY escape hatch and deprecation banner.
• Permanent (301) redirects — /admin, /admin/v2[/...] and /admin/v3[/...] now 301-redirect into the /os equivalent.

Upgrading from v1.5.0

No data migration. The admin is at /os; old /admin, /admin/v2 and /admin/v3 URLs redirect there automatically. Update any bookmarks/automation that hard-coded /admin/v2, and drop the ADMIN_LEGACY env var (now a no-op).

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What's New in v1.5.0

Full notes in CHANGELOG.md · upgrade steps in docs/UPGRADING.md

VayuOS — One Admin (ADR-0069, ADR-0073) — the three historical admin surfaces (the classic console /admin, Admin v2 /admin/v2, and Admin v3 /admin/v3) consolidate into a single, fast admin: VayuOS, mounted at /os. All three legacy paths now 302-redirect into the /os equivalent. The block editor gains depth, the Theme Studio becomes native, and legacy posts can be adopted into blocks losslessly — all on the same sovereign single binary with zero CDNs and a strict CSP (no unsafe-eval, no unsafe-inline, per-request nonces).

• AI-assist slash commands (opt-in) — when VAYU_AI_URL is configured, the block editor's slash palette gains an AI section (continue, rewrite, summarise) with an inline Accept/Discard overlay. Disabled and invisible by default; nothing leaves your server unless you wire up a local model.
• Inline version-history diff — a History panel lists recent versions and renders a word-level LCS diff against the working draft.
• Native Theme Studio in VayuOS — preset gallery + design-token editor with a CSP-clean live preview via scripted CSSOM custom-property writes (no <style> injection), served from session-gated /os/api/theme/* mirrors.
• Convert-to-blocks (ADR-0073) — an explicit, confirmed, non-destructive action imports a legacy article's HTML into a block document (blocks_json side-car) via blockrender.ImportHTML. articles.content is never touched, so the action is reversible by simply not saving.
• Governance panel (/os/governance) — a dedicated control surface for the adaptive-governance runtime: current system mode + full transition lineage, the severity-classified error-budget ledger, and a live policy-engine evaluation (pass / warning / fail). Server-rendered, CSP-clean.
• Formal plugin interface spec (ADR-0074) — docs/plugins/SPEC.md is a normative, RFC-2119, independently versioned (v1.0) contract: plugin kinds, manifest schema, deny-by-default capability model, line-oriented JSON IPC protocol, hook events, lifecycle and conformance. The Tools panel gains a live registry of sandboxed out-of-process plugins (running/quarantined, PID, invocations, crashes).
• Legacy-route log warnings — every hit on /admin, /admin/v2 or /admin/v3 emits a structured warn log line naming the /os target and the removal release, so operators can find stale bookmarks and integrations.
• Legacy admin surfaces redirect to VayuOS (ADR-0069) — /admin, /admin/v2[/...] and /admin/v3[/...] now 302-redirect to the /os equivalent. Set ADMIN_LEGACY=1 to keep the deprecated v2 pages reachable for one more release; they are scheduled for removal in v1.6.0.

Upgrading from v1.4.0

No breaking changes. The admin now lives at /os; bookmark it there. Old /admin, /admin/v2 and /admin/v3 URLs redirect automatically. Operators who still rely on the deprecated v2 pages must set ADMIN_LEGACY=1. AI-assist stays off unless VAYU_AI_URL is set.

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What's New in v1.4.0

Full notes in CHANGELOG.md · upgrade steps in docs/UPGRADING.md

Sovereign Rich Media & Theme Studio (ADR-0070) — put diagrams, video, and arbitrary embeds into posts, and restyle the whole site from a visual editor, without a single third-party reader-side request. Every capability is a typed block or server-rendered asset; the strict reader CSP (no unsafe-eval, no unsafe-inline, no wildcard frame-src/img-src) is never relaxed by default.

• Pure-Go Mermaid → SVG diagrams — diagram blocks compile six grammars (flowchart, sequence, pie, state, class, gantt) to static, themeable, sanitised SVG entirely on the server. No headless browser, no Node, no client JavaScript, no eval. Unsupported sources degrade to an annotated code block. Live editor preview via a debounced endpoint; results cached in diagram_cache.
• Privacy-first embeds — paste any URL for a self-hosted link card (OpenGraph fetched via the SSRF-hardened safefetch client; thumbnail imported, never hotlinked). YouTube/Vimeo become click-to-load facades: nothing third-party loads until the reader clicks, then a sandboxed iframe opens to the cookie-free origin. A per-page CSP builder narrows frame-src to a closed allowlist only for pages that need it.
• Theme Studio — a sovereign design-token system: typed tokens (colour ramps, typography, spacing, radii), a hex-validated CSS-variable compiler, eight system-font presets (Aurora, Slate, Terminal, Sepia, Carbon, Ocean, Sakura, Default), and a Studio tab with a preset gallery + live preview that re-themes instantly via CSSOM — no inline styles, CSP stays strict.
• Security — anchored video-host matching (refuses spoofed evil.com/youtube.com/… URLs), a fail-fast pre-flight SSRF host barrier in safefetch, and all emitted HTML/SVG through bluemonday allowlists.

Upgrading from v1.3.0

No breaking changes. Start the server once and migrations 027–029 apply automatically (embed cache, diagram cache, theme tokens). No configuration changes; rich media and the Theme Studio are available immediately.

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What's New in v1.3.0

Full notes in CHANGELOG.md · upgrade steps in docs/UPGRADING.md

VayuOS — a ground-up admin & block editor that surpasses Ghost, WordPress, and Substack in design, depth, and security, while remaining a sovereign single binary with zero CDN dependencies and a strict CSP (no unsafe-eval, no unsafe-inline). Mounted at /os alongside /admin/v2 — fully non-breaking (ADR-0068).

• Design system — hand-authored CSS, CSS-custom-property theming (dark/light/auto), grouped sidebar, command palette (⌘K), mobile bottom-nav, toast notifications.
• Block editor — typed-block document stored as JSON, rendered server-side through HTML escape + bluemonday UGC sanitisation (internal/blockrender). No raw-HTML escape hatch. Slash-command palette, autosave (⌘S), and a DOMPurify-guarded live preview. Legacy posts stay in the lossless v2 editor.
• Media library — drag-and-drop upload, content-addressed, type-allowlisted, SVG refused (XSS vector), CSRF-protected, grid browsing, copy-URL.
• Two-factor auth (TOTP) — RFC 6238 in pure Go stdlib (internal/totp, validated against RFC test vectors). Two-step enrolment: secret stored disabled until verified, so abandoned setup can never lock an operator out. Enforced on both v2 and v3 sign-in surfaces.
• Intelligence — native SEO readiness dashboard and privacy-preserving analytics page sourced entirely from the local SQLite database.
• Security hardening — CodeQL-clean: html.EscapeString called directly (not via a function alias) in all block-editor render paths; email Subject now emitted as an RFC 2047 base64 encoded-word (mime.BEncoding), clearing both the go/reflected-xss and go/email-injection findings.

Upgrading from v1.2.0

No breaking changes. Start the server once and migrations 025–026 apply automatically (adds blocks_json to articles and totp_secret/totp_enabled to users). Admin v2 is unaffected; Admin v3 lives at a separate path.

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What's New in v1.2.0

Full notes in CHANGELOG.md · upgrade steps in docs/UPGRADING.md

Four shipped tiers of new capability — all single-binary, all sovereign, all honouring the strict-CSP and governed-write invariants.

Tier 1 — Sovereign foundations: standard-library SMTP email + double-opt-in newsletter, durable scheduled publishing, multi-author accounts (Argon2id + server-side sessions), and stdlib-only automatic image optimization (no CGO).

Tier 2 — Reach & insight: cookieless zero-PII analytics, HMAC-signed outbound webhooks with retry + delivery audit, Mastodon auto-posting, Ghost/WordPress importers, a local-Ollama AI writing assistant (suggest-only), and memberships & paywalls with passwordless magic-link sign-in and an optional, signature-verified Stripe webhook.

Tier 3 — Reading polish (ADR-0066): server-side syntax highlighting (chroma, style-src 'self'-safe via a highlight-before-sanitise placeholder pipeline), related articles (precise comma-token tag matching), reading-time, PDF/document uploads, comment-approval emails, and an installable PWA with offline service worker.

Tier 4 — Enterprise interfaces (ADR-0067): a read-only GraphQL content API (query-only — no mutation surface), internationalisation with Accept-Language negotiation and operator-editable catalogs, customisable transactional email templates, and a real-time SSE event stream. Cloudflare edge-purge + IndexNow CDN push fire on every mutation.

Upgrading from v1.1.0

No breaking changes. Start the server once and migrations 019–024 apply automatically. Every new capability is opt-in and a safe no-op until configured (SMTP, Stripe, Mastodon, Ollama, Cloudflare, etc.).

What's New in v1.1.0

Full notes in CHANGELOG.md · upgrade steps in docs/UPGRADING.md

• Built-in vayupress migrate command — import Markdown folders straight into the database (migrate markdown, migrate list, migrate info); no separate tool to build. Idempotent (INSERT OR IGNORE), YAML-frontmatter aware, with --dry-run.
• Multi-format post editor — author each post in Markdown or raw HTML via a segmented toggle. The chosen format and editable source round-trip losslessly through the new article_sources side-car table (migration 018); the public renderer always receives server-sanitised HTML.
• Dual-write autosave — every save persists the editable source and the rendered HTML in parallel; new posts create-and-redirect to a permanent URL.
• Security hardening — HTML-escaped article title/slug in the admin dashboard, XML-escaped sitemap <loc> slugs, and CDATA-injection defence in the RSS feed (security review 2026-06-19).

Upgrading from v1.0.0

No breaking changes. Start the server once and migration 018 applies automatically. The legacy /admin console is untouched. Existing posts open in the editor in HTML mode until first saved in Markdown mode.

Platform Screenshots

Screenshots are regenerated automatically from a live instance by the screenshots CI workflow and committed back to docs/screenshots/. Run it via GitHub → Actions → screenshots → Run workflow.

Public Homepage

Public homepage — article grid with tag filtering, dark/light mode toggle, zero-telemetry footer, system mode indicator. Styled on vendored Pico CSS served locally to keep the strict style-src 'self' CSP intact.

Article Page

Rendered article — JSON-LD schema, author/date meta, tag strip, reading time, zero third-party requests.

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Theme Studio — Native to VayuOS

The Theme Studio, now native to VayuOS (/os/theme) — a preset gallery and design-token editor with an instant live preview. Colour ramps, typography and spacing compile to a single sovereign stylesheet served from your own origin. The preview applies values through CSSOM setProperty, so it stays inside the strict style-src 'self' CSP — no inline styles, no third-party fonts, no CDNs (ADR-0070, ADR-0069).

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VayuOS — The Single Control Panel & Block Editor

The VayuOS dashboard (/os) — grouped sidebar, stat cards, 14-day publishing-trend sparkline, activity feed, and command palette (⌘K).

The block editor — typed-block document rendered server-side through escape + bluemonday UGC, slash-command palette with opt-in AI-assist, an inline version-history diff, autosave, and live preview.

As of v1.6.0 the flagship admin (/os) is the only admin surface — it surpasses Ghost/WordPress/Substack in design and depth while staying a sovereign single binary with zero CDN dependencies and a strict CSP (no unsafe-eval, no unsafe-inline). Admin v2 has been removed; the legacy /admin, /admin/v2 and /admin/v3 paths permanently (301) redirect here (ADR-0068, ADR-0069 Stage 3).

• Design system — hand-authored, CSS-custom-property theming (dark/light/auto), grouped sidebar, command palette (⌘K), mobile bottom-nav. No inline styles.
• Block editor — typed-block document stored as JSON; every block is rendered to HTML server-side through escape + bluemonday UGC (internal/blockrender), with no raw-HTML escape hatch. Slash-command palette (with opt-in AI-assist), inline version-history diff, autosave, ⌘S, and a server-rendered + DOMPurify-guarded live preview. Legacy posts open losslessly and can be adopted into blocks via an explicit, reversible Convert to blocks action (ADR-0073), so a save can never wipe existing content.
• Media library — drag-and-drop upload (content-addressed, type-allowlisted, SVG refused, CSRF), grid browsing, copy-URL.
• Two-factor auth (TOTP) — RFC 6238 in pure stdlib (internal/totp, validated against the RFC test vectors), enforced on the VayuOS login surface.
• Intelligence — native SEO readiness dashboard and a privacy-preserving analytics page sourced only from the local database.

All interactivity is vanilla JS in same-origin files; the only inline <script> is the per-request nonce-gated bootstrap, and DOM mutation uses createElement/textContent — never innerHTML with untrusted data.

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Sign in & Sign up

The VayuOS sign-in page (/os/login) — passwordless-friendly, strict-CSP, self-hosted. The single front door to the whole control panel.

The public reader/member signup page (/signup) — branded, site-themed, passwordless. A reader enters their email and receives a one-time sign-in link (the member is created on first use). Zero third-party requests.

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Operator consoles — inside VayuOS

As of v1.6.0 the operator consoles below are no longer a separate admin panel — they render inside the single VayuOS shell under /os/* (an Operations sidebar section). The legacy /admin/modes, /admin/policy, /admin/topology, /admin/replay, /admin/faults and /admin/adr page URLs permanently (301) redirect into VayuOS.

System Modes & Policy Engine

Platform control plane (/os/modes) — 6 adaptive system modes with validated transition graph, append-only mode history, and all registered policies with live pass/warn/fail status.

Policy Provenance Inspector (Ω11)

Live policy evaluation table — per-policy category/severity/result strip, run-history trend, and persistent evaluation log for provenance and trend analysis.

Runtime Topology (Ω9)

Interactive operator console — 17-node live runtime graph (write path, delivery/read, governance, observability) with health derived in real time from failed-job counts, current mode, and fault-escalation state.

Replay Explorer (Ω10)

Write-job lifecycle inspector — dead-letter & poison-queue surface with single-job and batch requeue, full lifecycle chain (pending → processing → completed → retry ×3 → dead-letter → replay ×3 → quarantined).

Fault Manager

Fault escalation surface — active faults with severity level, trigger source, and escalation path through the mode state machine.

ADR Registry

Architecture Decision Records — every design decision indexed with status, date, and rationale. Governance documentation lives in the running system, not a separate wiki.

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Quick Start

curl -sSL https://raw.githubusercontent.com/johalputt/vayupress/main/scripts/deploy-vayupress.sh | bash

Or clone and deploy manually:

git clone https://github.com/johalputt/vayupress.git
cd vayupress
sudo ./scripts/deploy-vayupress.sh

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What Is VayuPress?

VayuPress ("Vayu" — Sanskrit for wind/speed) is governed publishing infrastructure for developers, writers, and AI-assisted content engines who need:

• Adaptive runtime governance — policy-driven system modes (Normal/Degraded/ReadOnly/Recovery/Maintenance/Quarantined) with validated transition graph and operational convergence
• Single-VPS efficiency — runs on 12 GB RAM / 6 vCPU / 250 GB NVMe
• Total control over content, hosting, and data
• No vendor lock-in — SQLite, Go, Nginx, open standards only
• Zero telemetry — no tracking, no analytics harvesting, no third-party calls
• Platform-kernel integrity — immutable signing, migration integrity, identity model, event durability, and audit trail enforced by the policy engine
• Security-first — sandboxed subprocess plugins, capability enforcement, SSRF protection, durable replay protection, WORM audit log
• Full observability — structured JSON logging, distributed tracing, SLO error budgets, fault injection framework

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Architecture Overview

                     +----------------------------------+
                     |           Internet               |
                     +---------------+------------------+
                                     | HTTPS (443)
                     +---------------v------------------+
                     |    Nginx (TLS termination,        |
                     |    static files, gzip, CSP)       |
                     +---------------+------------------+
                                     | HTTP (127.0.0.1:8080)
             +---------------------------v------------------------------+
             |                VayuPress Go Binary                       |
             |                                                           |
             |  ┌─────────────────────────────────────────────────┐    |
             |  │            Platform Kernel (immutable)           │    |
             |  │  signing · migrations · did · outbox · policy   │    |
             |  │  slo · mode · audit                             │    |
             |  └─────────────────────────────────────────────────┘    |
             |                                                           |
             |  ┌──────────┐  ┌──────────┐  ┌────────────────────┐    |
             |  │  Router  │  │  Plugin  │  │   Write Queue      │    |
             |  │  (chi)   │  │  Pool    │  │   (async workers)  │    |
             |  └────┬─────┘  └────┬─────┘  └─────────┬──────────┘    |
             |       │              │                   │               |
             |  ┌────▼──────────────▼───────────────────▼──────────┐  |
             |  │              SQLite (WAL mode)                    │  |
             |  │  articles · media · write_jobs · audit_log        │  |
             |  │  outbox_events · delivered_events · replay_store  │  |
             |  └───────────────────────────────────────────────────┘  |
             |                                                           |
             |  Lifecycle Manager → Outbox Relay → Event Bus            |
             |  Policy Engine → System Modes → Subsystem Hooks          |
             |  Resource Watchdog → Sandbox Pool → Subprocess IPC       |
             +---------------------------+------------------------------+
                                         |
              +--------------------------+---------------------------+
              |                          |                           |
   +----------v----------+  +-----------v---------+  +-------------v------+
   |  Meilisearch        |  |  Isso               |  |  fail2ban / UFW    |
   |  (optional search)  |  |  (self-hosted       |  |  (firewall)        |
   |  <50ms p95          |  |   comments)         |  |                    |
   +---------------------+  +---------------------+  +--------------------+

---

Platform Kernel

VayuPress has an immutable platform kernel — components that define invariants no plugin, extension, or subsystem can bypass. Changes require an RFC and 2/3 supermajority vote.

Component	Package	Invariant
Signing	internal/signing	Every published article has a valid Ed25519 signature
Capability Enforcement	internal/sandbox	Plugin capabilities checked against manifest before every Invoke()
Migration Integrity	internal/migrations	Checksums verified against embedded SQL; drift is a hard error
Identity Model	internal/did	DID:key authentication; no shared-secret fallback
Event Durability	internal/outbox	Events written to outbox in same transaction as state change
Audit Trail	internal/migrations (journal)	Migration journal is append-only; no entry may be deleted
SLO Error Budget	internal/slo	BudgetExhausted() blocks the release gate
Policy Engine	internal/policy	All governance policies registered here; no ad hoc enforcement

See docs/architecture/kernel-boundary.md for the full kernel boundary specification.

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System Modes

VayuPress operates in one of six adaptive system modes, governed by the policy engine:

Mode	Trigger	Effect
normal	Default	All subsystems fully operational
degraded	SLO error budget exhausted	Feature work pauses; writes allowed
read-only	Migration checksum drift	Writes refused; recovery required
recovery	Active recovery operation	Migration apply allowed; writes blocked
maintenance	Operator-initiated	Planned downtime; controlled shutdown
quarantined	Plugin quarantine threshold	Plugin and federation suspended

Transitions are validated against a deterministic graph. Every transition is logged to an append-only history. Policy evaluation drives automatic transitions; operators can force transitions via CLI.

See docs/architecture/system-modes.md.

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Internal Package Architecture

Package	Role
cmd/vayupress	Bootstrap, route wiring, graceful shutdown
internal/ai	Local embedding, semantic search, policy-governed inference
internal/api	ArticleService, repository pattern, typed domain errors
internal/archcheck	AST-level architecture validator (import rules, global state, shared abstractions)
internal/auth	JWT, CSRF, Argon2id hashing, rate-limit buckets
internal/cluster	Leader election, node coordination
internal/compat	Compatibility golden tests for Stable contract verification
internal/config	Env-driven config, version compatibility validation
internal/db	SQLite init, WAL checkpoint, migrations via embed.FS
internal/did	DID:key authentication with Ed25519
internal/events	Typed event structs, Envelope, Bus, idempotent dispatch
internal/fault	Fault injection framework — named probabilistic fault points
internal/federation	ActivityPub inbox/outbox, replay protection, adversarial hardening
internal/governance	RFC voting, supermajority enforcement
internal/graph	Merkle tree content integrity
internal/health	Structured health contracts (/health/* endpoints)
internal/httputil	WriteJSON, WriteError, DecodeJSON — thin HTTP primitives
internal/lifecycle	Ordered startup/shutdown with named phases
internal/logging	Structured JSON logging with correlation/causation fields
internal/merkle	SHA-256 Merkle tree for article content proofs
internal/metrics	Atomic metric counters, snapshot collection
internal/migrations	Migration engine with dry-run, checksum verification, journal, rollback
internal/mode	System Mode state machine — policy-driven adaptive runtime
internal/outbox	Transactional outbox relay — poll + dispatch event envelopes
internal/plugins	Hook registry, worker pool, subprocess plugin management
internal/policy	Platform Policy Engine — architecture/security/reliability/release governance
internal/profiling	Rate-limited pprof, health fingerprints, goroutine leak detection
internal/queue	SQLite-backed async write queue, dead-letter replay
internal/registry	Plugin manifest registry
internal/render	Article renderer, cache writer, CSS asset generator
internal/resource	Semaphore-based concurrency limiters, resource watchdog
internal/sandbox	Subprocess IPC pool, Linux seccomp/namespaces, capability enforcement
internal/search	FTS5 + semantic search, Meilisearch client, sharded index
internal/signing	Ed25519 article signing and verification
internal/slo	SLO error budget tracking — rolling windows, exhaustion signals
internal/storage	Content-addressed storage, IPFS stubs
internal/testutil	Shared test helpers
internal/trace	Span-based tracing with correlation/causation IDs
internal/ws	WebSocket/SSE hub for real-time event streaming

---

Feature List (P1–P27 + Ω1–Ω11)

Core Publishing (P1–P8)

• RESTful JSON API for articles (CRUD with slugs, tags, full-text content)
• Async write queue — SQLite-backed, crash-safe, with dead-letter replay
• Scheduled publishing — stage future-dated posts (RFC3339), promoted through the normal render/index/cache pipeline by a durable SQLite-backed ticker that also catches up anything missed during downtime
• Sovereign email & newsletter — plain-SMTP delivery on the Go standard library (no third-party SDKs, no hosted senders), double opt-in confirmations, and one-click broadcasts with auto unsubscribe links; a safe no-op until SMTP_HOST is set
• Automatic image optimization — stdlib-only (no libvips/CGO) downscaling of oversized PNG/JPEG editor uploads with area-averaging resampling; GIF/WebP pass through untouched
• Sovereign rich media (ADR-0070) — embed blocks unfurl any URL into a self-hosted link card; YouTube/Vimeo render as privacy-first click-to-load facades (no third-party request until the reader clicks). A pure-Go Mermaid→SVG engine compiles six diagram grammars (flowchart, sequence, pie, state, class, gantt) server-side with zero client JavaScript. Every server-side fetch goes through the SSRF-hardened safefetch client; all output is bluemonday- sanitised with no raw-HTML escape hatch
• Sitemap XML, RSS feed, and robots.txt auto-generation
• In-memory render cache with static-file output via Nginx
• SQLite WAL mode with adaptive checkpointing
• Migration checksum drift detection — halts startup on tampering
• Immutable WORM audit log via SQLite ABORT triggers
• Plugin hook system with worker pool, panic recovery, and circuit-breaker disable

Security & Governance (P9–P13)

• Multi-author accounts & password login — Argon2id-hashed credentials, server-side SQLite sessions (only token SHA-256 stored), hardened HttpOnly/SameSite=Lax cookie; admin pages accept an API key or a login session. Bootstrap via vayupress user add … --admin
• Automated CI governance — 15+ CI jobs, ci-pass gate
• Supply-chain secret scanning (TruffleHog), license compliance, shell linting
• Structured health contracts: /health/live, /health/ready, /health/dependencies, /health/storage, /health/search, /health/queue
• /health/ethics — machine-readable ethics compliance endpoint
• Ethical AI Charter in ETHICS.md (no training on user data, no telemetry)

Multi-Package Architecture (P14–P19)

• 35+ internal/ packages with compiler-enforced boundaries
• App struct owns all mutable runtime state — no package-level globals
• Repository pattern: ArticleRepo interface backed by SQLite
• Integration test harness with go test -race ./...

Integrations & Insight (Tier 2)

• Privacy-first analytics — cookieless, consent-free page-view counting with zero PII (no IPs, UAs, cookies, or per-visitor rows); only daily aggregates per path/referrer. GET /api/v1/admin/analytics
• Outbound webhooks — HMAC-SHA256-signed JSON POSTs on article create/update/delete to Zapier/n8n/Make/custom services, with bounded retry and a per-hook delivery audit trail
• Social auto-posting — newly published articles auto-share to Mastodon/Pleroma/Akkoma via a single app token (no OAuth dance), async and best-effort with idempotency
• Built-in Ghost & WordPress importers — vayupress migrate ghost --file … and vayupress migrate wordpress --file … move content off both platforms with no external tooling (titles, slugs, dates, tags, draft status preserved)
• Sovereign AI writing assistant — summarize / improve / titles / SEO / continue, powered by a local Ollama server (no hosted model, no telemetry). Suggest-only — never auto-edits. POST /api/v1/admin/ai/assist
• Memberships & paywalls — passwordless magic-link reader login, per-article access levels (public/members/paid) with preview + CTA, and an optional signature-verified Stripe webhook for paid upgrades (no embedded payment SDK)

Event-Driven Reliability (P20–P22)

• Transactional outbox — events written atomically with article mutations
• lifecycle.Manager — ordered startup/shutdown with registered components
• Typed event structs with versioned schemas (article.created.v1)
• Idempotent dispatch via delivered_events deduplication table

Observability & Tracing (P22–P23)

• Structured JSON logging with LogFields — correlation/causation IDs on every line
• Span-based tracing: Start, SetAttribute, End
• SLO error budgets with rolling windows — 5 production SLOs tracked

Resource Governance & Sandboxing (P24–P26)

• Named semaphore limiters (articles.write, plugin.exec)
• Subprocess IPC pool for out-of-process plugin execution
• Linux seccomp filtering and namespace isolation for subprocess plugins
• Capability enforcement — subprocess plugins run with dropped privileges

Platform Stewardship (Ω1–Ω5)

• Security audit corpus — 6 security documents (attack surfaces, trust model, incident response, federation threats, sandbox boundaries, signing model)
• Compatibility contracts — stability matrix for 30+ packages, golden tests for Stable API contracts
• Architecture governance — bounded-context rules, ADR index (23 ADRs), import-layer validator
• Migration resilience — dry-run, checksum verification, append-only journal, rollback simulation
• Federation adversarial hardening — malformed payload rejection, SQLite-durable replay protection
• Platform Policy Engine — 6 canonical policies (architecture, security, reliability, release) unified under internal/policy
• WAL concurrency — stress tests verifying write serialisation and busy-timeout behaviour
• Kernel boundary document — immutable vs replaceable component classification
• System Modes — 6-mode adaptive state machine with validated transition graph, policy-driven automatic transitions, and subsystem hook registry
• Fault injection framework — named probabilistic fault points with deterministic replay for adversarial testing

Operational Cognition & Operator Console (Ω6–Ω11)

• Ω6 — Durable mode journal — every system-mode transition persisted to SQLite with cause attribution; survives restart
• Ω7 — Kernel/trace/event/fault panels — live runtime introspection surfaces on the admin dashboard
• Ω8 — Unified Operational Timeline — single causal narrative correlating mode transitions, faults, escalations, and queue events with relative + wall-clock time
• Ω9 — Interactive operator console — real control-plane pages that mutate live runtime state:
  • System Mode Engine (/admin/modes) — drive transitions through the validated graph; invalid moves rejected 409
  • Fault Engine (/admin/faults) — operator-driven fault simulation feeding the escalation threshold
  • Runtime Topology (/admin/topology) — 17-node live health graph
• Ω10 — Live-streaming timeline + Replay Explorer — animated causal arrows, STREAMING poller, and a dead-letter / poison-queue inspector (/admin/replay) with single-job and batch requeue
• Ω11 — Policy Provenance Inspector (/admin/policy) — SQLite-journaled policy evaluations (policy_evaluations table), live pass/warn/fail status, run-history trend sparkline, and a persistent provenance log of every policy run

Theme & Site Settings Control Panel (/admin/theme)

A governed customisation surface — every input is validated, no raw markup is trusted, and the strict CSP stays intact:

• Identity — site name, tagline, meta description, author. Baked into every public page; a save triggers a full rendered-cache purge so changes propagate.
• Palette — light/dark primary + accent colours (hex-validated). Rendered as Pico CSS-variable overrides and served same-origin at /theme.css (ETag + short max-age) — never inlined, so style-src 'self' holds. The first-deploy defaults match the vendored custom.css, so there is no flash-of-unstyled-content.
• Studio — a sovereign design-token theme system (ADR-0070, internal/theme): a typed 23-field token schema, a hex-validated CSS-variable compiler, and eight system-font presets (Default, Aurora, Slate, Terminal, Sepia, Carbon, Ocean, Sakura). The Studio tab shows a preset gallery and a live preview that re-themes instantly via CSSOM setProperty — no inline <style>, no style= attributes, so the strict CSP is untouched. Apply persists to theme_tokens (migration 029), recompiles /theme.css, and purges the render cache. API: GET/POST /api/v1/admin/theme/{presets,tokens,preview,apply} (auth + CSRF).
• Custom CSS — operator stylesheet, 16 KB cap, folded into /theme.css. Cannot reach external origins or execute scripts (CSP-contained).
• Head & SEO — declarative, allowlisted capabilities (keywords, theme-color, robots, Google/Bing verification) rendered to escaped <meta> tags. Raw <head> HTML is intentionally not accepted — meta-refresh redirects, external beacons, and <base> hijacks are structurally impossible, not merely filtered.
• Storage & safety — persisted in the site_settings table (migration 006, content-checksummed like every migration); writes are CSRF-protected, blocked in read-only/quarantined modes, and audit-logged (component: "theme").
• Public theme toggle — a sun/moon switch in the site header persists the reader's choice in localStorage; served as a same-origin script so it needs no CSP nonce (which cached HTML cannot carry).
• CSP telemetry — violations report to POST /csp-report, incrementing vayupress_csp_violations_total and logging the offending directive, so runtime CSP drift is observable rather than silent.

---

API Endpoints Overview

Method	Path	Description
GET	/api/articles	List articles (paginated, filterable by tag)
POST	/api/articles	Create article (async write queue)
GET	/api/articles/{slug}	Get article by slug
PUT	/api/articles/{slug}	Update article
DELETE	/api/articles/{slug}	Delete article
GET	/api/search?q=...	Full-text search (Meilisearch or SQLite fallback)
GET/POST	/api/v1/graphql	Read-only GraphQL content API (query-only — no mutations) (ADR-0067)
GET	/api/v1/i18n/{lang}	Merged i18n message bundle for a language (public)
GET	/api/v1/stream	Real-time SSE feed of article events (API-key-gated)
GET/PUT	/api/v1/admin/i18n[/{lang}]	List/override i18n languages (PUT CSRF-protected)
GET/PUT	/api/v1/admin/email-templates[/{kind}]	List/override transactional email templates (PUT CSRF-protected)
GET	/manifest.json · /sw.js	PWA manifest + offline service worker
GET	/static/chroma.css	Syntax-highlighting stylesheet (style-src 'self')
GET	/health/live	Liveness probe
GET	/health/ready	Readiness probe
GET	/health/dependencies	Dependency health (DB, search, queue)
GET	/health/storage	Storage quota and utilization
GET	/health/search	Meilisearch status and circuit-breaker state
GET	/health/queue	Write queue depth and worker stats
GET	/health/ethics	Machine-readable ethics compliance
GET	/sitemap.xml	Auto-generated XML sitemap
GET	/feed.xml	Auto-generated RSS feed
GET	/robots.txt	Auto-generated robots.txt
GET	/api/v1/openapi.json	OpenAPI 3.0 description of the API (embedded, public)
GET	/metrics	Internal metrics snapshot (admin auth required)

Operator console (admin auth required)

Method	Path	Description
GET	/admin	Runtime governance dashboard + Unified Operational Timeline
GET	/admin/modes	System Mode Engine — drive validated mode transitions
GET	/admin/faults	Fault Engine — operator-driven fault simulation
GET	/admin/topology	Runtime Topology — 17-node live health graph
GET	/admin/replay	Replay Explorer — dead-letter & poison queue
GET	/admin/policy	Policy Provenance Inspector — journaled evaluations
GET	/admin/theme	Theme & Site Settings control panel
POST	/admin/theme	Save theme/identity settings (CSRF-protected)
POST	/admin/mode/transition	Transition system mode (CSRF-protected)
POST	/admin/fault/simulate	Fire a named fault (CSRF-protected)
POST	/admin/replay/job	Requeue a single dead-letter job (CSRF-protected)
POST	/admin/benchmark	Run the in-process load benchmark (CSRF-protected)
GET	/api/v1/admin/severity	Formal operational severity taxonomy (self-documenting)
GET	/api/v1/admin/budgets	Governance error-budget state + recommended escalation
GET	/api/v1/admin/search/drift	Search-index vs article-store drift report
POST	/admin/search/reindex	Rebuild the search index from the store (CSRF-protected)
POST	/api/v1/admin/newsletter/broadcast	Email all confirmed subscribers (CSRF-protected)
GET	/api/v1/admin/schedule	List staged scheduled posts
POST	/api/v1/admin/schedule	Stage a future-dated post (CSRF-protected)
DELETE	/api/v1/admin/schedule/{id}	Cancel a scheduled post (CSRF-protected)
GET	/api/v1/admin/users	List author accounts (admin role)
POST	/api/v1/admin/users	Create an account (admin role, CSRF-protected)
DELETE	/api/v1/admin/users/{email}	Delete an account (admin role, CSRF-protected)
POST	/os/login	Email + password sign-in (issues session cookie)
POST	/os/logout	Destroy the current session
GET	/api/v1/admin/analytics	Privacy-first page-view summary (cookieless)
GET	/api/v1/admin/webhooks	List outbound webhooks
POST	/api/v1/admin/webhooks	Register a webhook (CSRF-protected)
DELETE	/api/v1/admin/webhooks/{id}	Delete a webhook (CSRF-protected)
GET	/api/v1/admin/webhooks/{id}/deliveries	Webhook delivery audit trail
GET	/api/v1/admin/ai/status	AI assistant availability + supported ops
POST	/api/v1/admin/ai/assist	Run a local-LLM writing operation (CSRF-protected)
POST	/api/v1/members/login	Request a passwordless member sign-in link
GET	/members/verify	Consume a magic link, start a member session
GET	/api/v1/admin/members	List members + tier counts
PUT	/api/v1/admin/members/{email}/tier	Set a member's tier (CSRF-protected)
PUT	/api/v1/admin/articles/{slug}/access	Set article access level (CSRF-protected)
POST	/api/v1/stripe/webhook	Signed Stripe webhook → paid upgrades (optional)

Public theming endpoints (no auth): GET /theme.css (operator palette + custom CSS, served same-origin for CSP), GET /static/js/theme-toggle.js (sun/moon switcher), POST /csp-report (CSP violation telemetry → vayupress_csp_violations_total).

Full reference: docs/API-REFERENCE.md

---

Companion Tools

New in v1.1.0 — built-in migrate command. The main binary now imports Markdown folders directly, no separate tool to build:

vayupress migrate markdown --dir ./posts --dry-run   # preview
vayupress migrate markdown --dir ./posts             # import
vayupress migrate info                               # all platform options

Imports write both the sanitised article and an article_sources side-car so the VayuOS block editor can reopen each post losslessly. See docs/MIGRATION.md for the full guide.

Standalone migration and import tools live under tools/. Each is an independent Go module — builds without pulling in the engine.

Migration Tools

Tool	Migrates from	Source
ghost-to-vayu	Ghost CMS (MySQL or SQLite direct DB)	tools/ghost-to-vayu
wordpress2vayu	WordPress MySQL — posts, pages, categories, tags, featured images	tools/wordpress2vayu
hugo2vayu	Hugo Markdown sites (YAML + TOML frontmatter)	tools/hugo2vayu
jekyll2vayu	Jekyll _posts (YAML frontmatter, date-in-filename)	tools/jekyll2vayu
substack2vayu	Substack posts.csv export	tools/substack2vayu
notion2vayu	Notion HTML export (ZIP or directory)	tools/notion2vayu
medium2vayu	Medium HTML export (ZIP or directory)	tools/medium2vayu
markdownfolder2vayu	Any folder of Markdown files with YAML frontmatter	tools/markdownfolder2vayu

All migration tools share the same design: direct source access (no API keys needed), keyset pagination, throttled batching, checkpoint/resume, and idempotent INSERT OR IGNORE writes.

Operational Tools

Tool	Purpose	Source
vayu-backup	Compress, verify, and restore VayuPress SQLite databases	tools/vayu-backup
vayu-export	Render all articles to a static HTML site for CDN or archiving	tools/vayu-export
vayu-validate	Content integrity checker — slug validity, duplicates, bad dates, oversized content	tools/vayu-validate

# Migrate from Ghost
cd tools/ghost-to-vayu && go build -o ghost2vayu ./cmd/ghost2vayu
./ghost2vayu migrate --ghost-driver mysql \
  --ghost-dsn "user:pass@tcp(localhost:3306)/ghost_production" \
  --vayu-db /var/lib/vayupress/vayupress.db

# Import Markdown posts
cd tools/markdownfolder2vayu && go build -o md2vayu ./cmd/md2vayu
./md2vayu import --dir ./posts --vayu-db /var/lib/vayupress/vayupress.db

# Validate after migration (exits 1 on errors — CI-safe)
cd tools/vayu-validate && go build -o vayu-validate ./cmd/vayu-validate
./vayu-validate validate --db /var/lib/vayupress/vayupress.db

Built-in Plugin Features

These features are part of VayuPress core (no external service required):

Feature	Package	API
SEO Optimizer	internal/seo	Auto OpenGraph, Twitter Card, JSON-LD per article
Comments	internal/comments	POST /api/v1/articles/{slug}/comments + moderation
Article Versions	internal/versions	GET /api/v1/admin/articles/{slug}/versions
Series/Collections	internal/collections	GET/POST /api/v1/collections
Newsletter	internal/newsletter	POST /api/v1/newsletter/subscribe
Webmentions	internal/webmention	POST /webmention (W3C receiver)
Draft Preview Links	internal/preview	POST /api/v1/admin/preview
Redirect Manager	internal/redirects	GET/POST /api/v1/admin/redirects
Table of Contents	internal/toc	GET /api/v1/articles/{slug}/toc
ActivityPub / Federation	internal/federation	Outbox relay + HTTP Signatures
Spam Guard	internal/spam	Comment classification middleware
Content Signing	internal/signing	HMAC article verification
Sovereign Self-Update	internal/update	Check-only web API + signature-verified CLI apply

Admin UI — VayuOS (/os)

VayuOS is the single, editor-first admin on a fully vendored, CSP-compliant stack (no CDNs, no unsafe-eval, per-request nonces). The typed block editor has AI-assist, inline version-history diff, live preview, a command palette (⌘K), distraction-free mode, word count / reading time, an SEO readiness meter and autosave. The historical Admin v2 (/admin/v2, ADR-0065) was removed in v1.6.0 (ADR-0069 Stage 3); its routes now permanently redirect to /os. See docs/ADMIN-UI.md, ADR-0068 and ADR-0069.

Self-Update

VayuPress can check for and apply its own updates sovereignly and safely:

vayupress update check               # read-only version/changelog check
vayupress update apply --dry-run     # verify checksum + Ed25519 signature, change nothing
vayupress update apply               # gated, signed, backed-up binary swap (CLI-only)

The web panel can only check (GET /admin/api/updates/check). Applying an update is CLI-only, requires opt-in (VAYU_SELFUPDATE_ENABLED=true) and an operator-pinned Ed25519 key (VAYU_RELEASE_PUBKEY), is refused in read-only/quarantine/maintenance mode, backs up the database first, and never auto-restarts. See docs/UPGRADING.md, docs/SECURITY.md, and ADR-0064.

---

Requirements

Requirement	Detail
Go	1.23+ (build from source; deploy script installs 1.25)
CGO / SQLite3	gcc required (libsqlite3-dev or bundled via go-sqlite3)
OS	Ubuntu 24.04 LTS (recommended); Linux kernel 5.x+ for sandbox features
RAM	8 GB minimum, 12 GB recommended
CPU	4 vCPU minimum, 6 vCPU recommended
Disk	50 GB NVMe minimum, 250 GB for 1M+ posts with media
Access	Root or sudo for deploy script

---

Deployment

Automated (recommended)

# Download and run the deploy script
curl -sSL https://raw.githubusercontent.com/johalputt/vayupress/main/scripts/deploy-vayupress.sh | bash

# Dry-run first (inspect what will be installed)
bash scripts/deploy-vayupress.sh --dry-run

# Upgrade an existing installation
bash scripts/deploy-vayupress.sh --upgrade

The deploy script handles: Go toolchain, CGO/SQLite3, binary build, Nginx with TLS and CSP, systemd service, Meilisearch (optional), nightly backup cron, fail2ban rules.

Manual Build

git clone https://github.com/johalputt/vayupress.git
cd vayupress
go build -race ./...                                   # development build
go build -ldflags="-s -w" -trimpath ./cmd/vayupress   # production binary

---

Development Setup

git clone https://github.com/johalputt/vayupress.git
cd vayupress

go build ./...          # build all packages
go test -race ./...     # full test suite with race detector
go vet ./...            # static analysis
gofmt -l .              # format check

make build test lint    # all-in-one

Environment Variables

Variable	Default	Description
VAYU_DOMAIN	localhost	Public domain name
VAYU_PORT	8080	HTTP listen port
VAYU_DB_PATH	/var/lib/vayupress/vayupress.db	SQLite database path
VAYU_WORKER_COUNT	4	Write queue worker goroutines
VAYU_PLUGINS_ENABLED	false	Enable plugin worker pool
VAYU_PLUGIN_TIMEOUT_MS	2000	Per-hook execution timeout
VAYU_PLUGIN_MAX_CONCURRENT	8	Max concurrent plugin executions
STATIC_DIR	/var/www/vayupress/static	Static asset output directory
MEILI_URL	http://127.0.0.1:7700	Meilisearch base URL
MEILI_MASTER_KEY	—	Meilisearch master key

---

Repository Structure

vayupress/
├── cmd/vayupress/          # Application entry point
│   ├── main.go             # Bootstrap, graceful shutdown, lifecycle wiring
│   ├── app.go              # App struct owning all mutable runtime state
│   ├── routes.go           # Route registration
│   ├── handlers_articles.go
│   ├── handlers_infra.go
│   ├── handlers_admin.go
│   └── middleware.go
├── internal/               # 35+ domain packages (compiler-enforced boundaries)
│   ├── archcheck/          # AST-level architecture validator
│   ├── compat/             # Compatibility golden tests
│   ├── fault/              # Fault injection framework
│   ├── federation/         # ActivityPub + replay protection
│   ├── migrations/         # Migration engine with resilience
│   ├── mode/               # System Mode state machine
│   ├── policy/             # Platform Policy Engine
│   ├── profiling/          # pprof + health fingerprints
│   ├── sandbox/            # Subprocess IPC, seccomp, capability enforcement
│   ├── signing/            # Ed25519 article signing
│   ├── slo/                # SLO error budget tracking
│   └── ...                 # (full list in package table above)
├── docs/
│   ├── adr/                # Architecture Decision Records (ADR-0001…ADR-0062)
│   ├── architecture/       # Bounded contexts, kernel boundary, system modes
│   ├── compatibility/      # Stability matrix, API contracts
│   ├── security/           # Attack surfaces, trust model, incident response
│   ├── reliability/        # SLOs, error budgets
│   ├── operations/         # WAL recovery, backup/restore runbooks
│   ├── release/            # Release gate checklist
│   └── ...
├── testdata/
│   ├── bench/              # Committed benchmark baselines
│   └── golden/             # Golden test files for Stable API contracts
├── scripts/
│   ├── deploy-vayupress.sh # Canonical self-contained installer
│   └── sync-source.sh      # Source integrity check
├── go.mod / go.sum
├── Makefile
├── GOVERNANCE-CONSTITUTION.md
├── CHANGELOG.md
├── SECURITY.md
├── ETHICS.md
└── CONTRIBUTING.md

---

Performance

Target: ≤50 ms p95 latency on a 4-vCPU VPS under sustained load.

Measured — end-to-end load (built-in benchmark harness)

Real numbers from the in-process load benchmark (POST /admin/benchmark) on a 4-vCPU Intel Xeon @ 2.80 GHz, 16 GB box, SQLite in WAL mode, 20 concurrent readers against the cached render path:

Metric	Measured	Target	Result
Read p50	16 ms	—	—
Read p95	16 ms	<50 ms	✅ PASS
Read p99	16 ms	<50 ms	✅ PASS
Read throughput	~8,700 RPS	—	—
Read mean	8.2 ms	—	—

Measured — micro-benchmarks (go test -bench)

Operation	Package	ns/op	allocs/op
Ed25519 sign	internal/signing	28,423 (28.4 µs)	7
Ed25519 verify	internal/signing	64,133 (64.1 µs)	4
Article input validation	internal/api	234	0
Slug validation	internal/api	384	0
Migration apply (full)	internal/migrations	142,151 (142 µs)	102
Event schema validate	internal/events/schema	196	0
Merkle proof generation	internal/merkle	1,403	20
Histogram record (metrics)	internal/metrics	18.3	0
Cache hit-ratio read	internal/metrics	0.46	0

Hot-path validation and metrics are zero-allocation. Reproduce with:

make bench                                  # committed baselines
go test -bench=. -benchmem -run=^$ ./...    # full micro-benchmark sweep
curl -X POST -H "X-API-Key: $KEY" .../admin/benchmark   # live end-to-end load

Static metric	Value	Mechanism
Cold start	<500 ms	Single static binary
Production binary	-ldflags="-s -w" -trimpath	Stripped, reproducible
Article page serving	Nginx static + in-memory render cache	No per-request render

---

Governance

VayuPress is governed by the VayuPress Governance Constitution v6.0.

Priority order (non-negotiable): Security = Data Integrity > Ethical Compliance > Reliability > Simplicity > Performance > DX > Feature Velocity

All governance policies are enforced by the Platform Policy Engine (internal/policy) and validated in CI on every push.

---

Key Documents

Document	Description
Kernel Boundary	Immutable kernel components and bypass prohibition
System Modes	Adaptive runtime mode specification
Bounded Contexts	Package layer rules and prohibited coupling
Stability Matrix	Stable/Beta/Experimental contract classification
SLOs	Production SLOs and error budget policy
Release Gate	Mandatory release checklist
Security	Vulnerability disclosure policy
Ethics	Ethical principles and AI charter
ADR Index	Full Architecture Decision Record index
API Reference	REST API reference
OpenAPI Spec	Machine-readable OpenAPI 3.0 (served at /api/v1/openapi.json)
Plugins Guide	Sandbox IPC protocol, manifests, example plugins
Monitoring	Prometheus alert rules + Grafana dashboard
Upgrading	Upgrade procedure + schema/migration authoring
Benchmarks	Measured performance + reproduction steps

---

Contact

Purpose	Email
General	hello@vayupress.com
Support	support@vayupress.com
Security	security@vayupress.com
Ethics	ethics@vayupress.com
Governance / RFCs	governance@vayupress.com

---

License

Apache License 2.0 — see LICENSE and NOTICE.

The Apache-2.0 license adds an explicit patent grant and trademark terms on top of a permissive core, which makes adoption inside organizations clearer than a bare MIT grant. Bundled third-party components retain their own licenses (see NOTICE).

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