Four manifestos, one question: do we know enough to ship?
Agile changed how we build. Digital changed what we build and how we govern it. Confidence Engineering changes how we know it works. Assurance holds all three to one accountable thread. Read them, unabridged, in their own words.
42 principles · 4 documents · 2001 → 2016 → 2026
A lineage, not a replacement.
Each manifesto keeps what came before and answers what changed: agility, then digitalisation, then probabilistic systems — with Assurance stretched over all of them.
The Agile Manifesto
12 principles
Four values and twelve principles behind the Manifesto for Agile Software Development — the document that reframed how software gets delivered.
Read it →Delivery2016The Digital Manifesto
12 principles · 3 values
Evolution over revolution: principles for digital solution delivery across Think, Make and Check, by Jonathon Wright.
Read it →Agentic era2026The Confidence Manifesto
6 values
Perfect software isn't achievable, but confidence is. Ship with real evidence, not optimism and vanity metrics.
Read it →Umbrella2026The Assurance Manifesto
6 values · 12 principles
The umbrella over all three: one accountable thread from intent, through delivery, to evidence of behaviour in production.
Read it →Manifesto Signatures
A living map of the people and places keeping these principles alive around the world.
The through-line
Agile asked us to value working software. Digital asked us to value adaptive outcomes. Confidence Engineering asks us to value evidence — because a system that passes every test can still fail every user.