ADLC Has Six Definitions and Zero Consensus — I Compared Every Major Framework

Last Updated on August 3, 2026 by Editorial Team Author(s): AIguru Originally published on Towards AI. ADLC Has Six Definitions and Zero Consensus — I Compared Every Major Framework created by GEMINI Ask six vendors what “Agentic Development Lifecycle” means and you’ll get six different phase counts, six different priorities, and at least two flatly contradictory claims about whether it’s even a new lifecycle at all. That’s not a hypothetical. I pulled every substantive ADLC framework published in the first half of 2026 — from a cloud consultancy, a security vendor, a systems integrator, a boutique dev shop, and an enterprise ops firm — checked whether Gartner or Forrester had stepped in to settle it, then lined all of it up side by side. They all use the same four-letter acronym. Almost nothing else about them agrees, and the analysts made it worse, not better. The real problem underneath the acronym Before picking this apart, it’s worth being fair to the underlying idea, because the problem it’s responding to is genuine. The classic Software Development Lifecycle assumes you can specify behavior at build time, test it before release, and expect it to run the same way in production as it did in staging. Agentic systems break that assumption in a specific way: they reason across context they don’t fully control, their outputs vary even given similar inputs, and small upstream changes compound into materially different downstream behavior. One preprint circulating on the subject — not yet peer reviewed, worth flagging — points to just how fast this shifted using SWE-bench Verified as a proxy: issue-resolution rates on that benchmark rose from under 2% to over 78% between October 2023 and April 2026. Whatever you call the practice of managing that shift, something in the SDLC does need to change. The question is whether “ADLC” actually names a coherent answer to that problem, or whether it’s a label six different companies are attaching to six different things they already wanted to sell. Six definitions, six structures EPAM frames ADLC around what it isn’t: not the old SDLC with AI coding assistants bolted on, but a lifecycle for systems where the model sits at the core of product behavior rather than accelerating a human who’s still doing the real work. Its version front-loads work traditional SDLC never required — defining business and technical KPIs upfront, mapping which decisions belong to humans versus the agent, and running a data-readiness review before anything gets built — because, in EPAM’s telling, skipping that step pushes compliance and accountability problems into production where they’re expensive to fix. Codebridge structures ADLC as six named phases: Ideation and Intent Specification, Architecture and Scaffolding, Development and the Inner Loop, Behavioral Testing and Validation, Deployment and Orchestration, and Governance. Its distinguishing idea is the “Capability Matrix” — a tool for deciding, phase by phase, which parts of a workflow need non-deterministic LLM reasoning and which need to stay deterministic, rule-based logic. A customer-intent classifier gets the model; an SLA timer or a financial calculation doesn’t. Sumatosoft takes a completely different shape: five pillars — zero-hallucination architecture, financial governance, security by architecture, human-in-the-loop control, multi-modal grounding — applied across seven phases. One worked example from its post illustrates the cost-governance pillar specifically: a token-economics review caught a design flaw that would have cost $180,000 a month at projected volume, and a model-routing fix — a cheap model for screening, a flagship model only for the hard cases — brought that down to $22,000. Cycode defines ADLC almost entirely through a security lens: autonomous agents calling tools, reading and writing code, querying APIs, and pulling dependencies without waiting for human approval at each step. Its central argument is that this creates two problems the old SDLC never had — the volume of AI-driven changes now exceeds human review capacity, and the agents making decisions have no innate sense of an organization’s risk tolerance or compliance posture. Palo IT takes the most deflationary position of the six, and it directly contradicts EPAM’s core claim. Its version of ADLC keeps the traditional SDLC phase names intact — requirements analysis, architecture, implementation, testing, deployment — and simply reassigns who performs them: AI agents handle execution, human engineers shift into orchestrator, reviewer, and decision-maker roles. In this telling, ADLC isn’t a new lifecycle at all. It’s the old one with the seats reshuffled. SPTech skips phase-counting altogether and frames ADLC as an executive governance concern first, an engineering framework second. Its version covers the full arc from idea to launch to ongoing iteration, but the emphasis sits on organizational risk — illustrated with a scenario where a customer-service agent quietly drifts into giving wrong refund answers for weeks before anyone notices, because agent lifecycle management got treated as a developer’s problem instead of a leadership one. Lay all six next to each other and the disagreement isn’t cosmetic. EPAM says this is fundamentally not the old SDLC. Palo IT says it’s exactly the old SDLC with different actors. Codebridge and Sumatosoft both propose fixed phase counts, and they don’t match — six phases versus seven. Cycode treats it as a security discipline. SPTech treats it as a leadership discipline. None of these sources cite each other. None acknowledge the others’ definitions exist. The analysts didn’t settle this — they fragmented it further The obvious next question: what do Gartner and Forrester say? Normally, when a technical term goes through exactly this kind of vendor-driven chaos, an analyst firm eventually steps in, picks a definition, and the market converges around it — that’s roughly what happened with terms like MLOps and DevSecOps. That hasn’t happened here, and checking why is more revealing than the six vendor definitions on their own. Neither Gartner nor Forrester has adopted “ADLC” as a term at all. Instead, each has coined its own distinct acronym for an adjacent — but narrower — slice of the problem. Forrester calls its framing AppGenSec: security built proactively into code generation itself. Gartner calls its […]